Category Archives: C++ Programs

c plus plus programs

C++ Program to Concatenate Two Strings

In this tutorial, we will learn to create a C++ program that will Concatenate Two Strings in C++ programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators in C++ Programming.
Basic Input and Output function in C++ Programming.
Basic C++ programming.
Using Strings in C++ Programming.

Algorithm:-

1. Declaring the variables for the program.

2. Taking input string 1 and 2 from the user. 

3. Concatinating the string from the taken variable.

4. Printing the result string.

5. End

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						1. Declaring the variables for the program.
 
2. Taking input string 1 and 2 from the user. 
 
3. Concatinating the string from the taken variable.
 
4. Printing the result string.
 
5. End

Program to Concatenate Two Strings

Concatenation means to join two values i.e. Strings. In strings, only one variable is declared which can store a sentence. It’s a collection of characters, digits, and Special characters. First will take the input string one from the user. Then we will take a second-string from the user and now we will concatenate that two stings.

Using the below program example.

Program Code:-

#include <iostream>  
using namespace std;  
int main ()  
{  
    //declaring the variables for the program
    string str1, str2, result; // declaring the string variables  
    int i;  //declaring the integer variables
    
    //taking input string1 from the user 
    cout <<"  Enter the first string: ";  
    cin >> str1; // take string1
    //taking input string2 from the user
    cout << "  Enter the second string: ";  
    cin >> str2; // take second string   
    // use for loop to enter the characters of the str1 into result string   
    for ( i = 0; i < str1.size(); i++)  
    {  
    result = result + str1[i]; // add character of the str1 into result   
    }   
    // use for loop to enter the characters of the str2 into result string   
    for ( i = 0; i < str2.size(); i++)  
    {  
    result = result + str2[i]; // add character of the str2 into result   
    }  
    cout << " The Concatenation of the string " << str1 << " and " << str2 << " is " <<result;  
    return 0;  
}

#include <iostream>

using namespace std;

int main ()

{

//declaring the variables for the program

string str1, str2, result; // declaring the string variables

int i; //declaring the integer variables

//taking input string1 from the user

cout <<" Enter the first string: ";

cin >> str1; // take string1

//taking input string2 from the user

cout << " Enter the second string: ";

cin >> str2; // take second string

// use for loop to enter the characters of the str1 into result string

for ( i = 0; i < str1.size(); i++)

{

result = result + str1[i]; // add character of the str1 into result

}

// use for loop to enter the characters of the str2 into result string

for ( i = 0; i < str2.size(); i++)

{

result = result + str2[i]; // add character of the str2 into result

}

cout << " The Concatenation of the string " << str1 << " and " << str2 << " is " <<result;

return 0;

}

Output:-

In the above program, we have first initialized the required variable.

str1 = it will hold the string value.
str2 = it will hold the string value.
result = it will hold the string value.
i = it will hold the integer value.

Taking Input string from the user for copying the string.

Concatenating the strings taken from the user with the help of the for loop.

Printing the output Concatenated String.

C++ Program to Find length of String

C++ Program to Find Length of String

In this tutorial, we will learn to create a C++ program that will Find the length of String in C++ programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators in C++ Programming.
Basic Input and Output function in C++ Programming.
Basic C++ programming.
Using Strings in C++ Programming.

Algorithm:-

1. Declaring the variables for the program.

2. Taking input strings from the user. 

3. Concatinating the string from the taken variable.

4. Printing the result string.

5. End

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						1. Declaring the variables for the program.
 
2. Taking input strings from the user. 
 
3. Concatinating the string from the taken variable.
 
4. Printing the result string.
 
5. End

Program to Find the length of String

In this program, we will take the input as a string from the user and then we will find the length of the input string. Using the predefined string function from the c++ libraries.

With the help of this below program, we can find the length of the String.

Program Code:-

#include <iostream>  
using namespace std;  
int main ()  
{  
    //declaring the variables for the program
    string str1, str2, result; // declaring the string variables  
    int i;  //declaring the integer variables
    
    //taking input string1 from the user 
    cout <<"  Enter the first string: ";  
    cin >> str1; // take string1
    //taking input string2 from the user
    cout << "  Enter the second string: ";  
    cin >> str2; // take second string   
    // use for loop to enter the characters of the str1 into result string   
    for ( i = 0; i < str1.size(); i++)  
    {  
    result = result + str1[i]; // add character of the str1 into result   
    }   
    // use for loop to enter the characters of the str2 into result string   
    for ( i = 0; i < str2.size(); i++)  
    {  
    result = result + str2[i]; // add character of the str2 into result   
    }  
    cout << " The Concatenation of the string " << str1 << " and " << str2 << " is " <<result;  
    
    //printing the size of the string 
    cout<< endl;
    cout <<"String Length = " << result.size();
    return 0;  
}

#include <iostream>

using namespace std;

int main ()

{

//declaring the variables for the program

string str1, str2, result; // declaring the string variables

int i; //declaring the integer variables

//taking input string1 from the user

cout <<" Enter the first string: ";

cin >> str1; // take string1

//taking input string2 from the user

cout << " Enter the second string: ";

cin >> str2; // take second string

// use for loop to enter the characters of the str1 into result string

for ( i = 0; i < str1.size(); i++)

{

result = result + str1[i]; // add character of the str1 into result

}

// use for loop to enter the characters of the str2 into result string

for ( i = 0; i < str2.size(); i++)

{

result = result + str2[i]; // add character of the str2 into result

}

cout << " The Concatenation of the string " << str1 << " and " << str2 << " is " <<result;

//printing the size of the string

cout<< endl;

cout <<"String Length = " << result.size();

return 0;

}

Output:-

In the above program, we have first initialized the required variable.

str1 = it will hold the string value.
str2 = it will hold the string value.
result = it will hold the string value.
i = it will hold the integer value.

Taking Input string from the user for copying the string.

Printing the output size of the string.

C++ Program to Calculate Standard Deviation

In this tutorial, we will learn to create a c++ Program to Calculate Standard Deviation.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C programming topics:

C++ Operators.
Functions.
For Loop and while loop.
Array.
String.

What Is Standard Deviation.?

The concept behind Standard Deviation is a measure of how spread out numbers are in a given Scenario.In Mathematical term, the Standard Deviation is measure of the amount of variation on set of values.

formula is Standard deviation is :=>

where ∑ sum means “sum of”.
x is a value in the data set.
μ is the mean of the data set.
and N is the number of data points.

in simple form Standard deviation is .

Find the mean ∑.

Find variation (Variance, take each difference, square it, and then average the result)

Sum the values from above step and divide by total numbers.

Standard Deviation is just the square root of Variance.

C++ Program to Calculate Standard Deviation

In this program , we will calculate Standard Deviation of a given numbers .First of all user will be prompted to enter a number and afterword passing these value to function to calculate Standard deviation.

#include <iostream>
#include <cmath>
using namespace std;

float SD(float values[]) // function for calculating standadr deviation
{
    float sum = 0.0, mean, sd = 0.0;

    int i;
    for(i = 0; i < 10; ++i)
    {
        sum = sum + values[i]; // calculating sum
    }
    mean = sum/10; // finding mean.
    for(i = 0; i < 10; ++i)
        sd = sd + pow(values[i] - mean, 2); // calculating standard deviation
    return sqrt(sd / 10);
}
int main()
{
    int i;
    float arr[10];
    cout << "Enter 10 elements: ";
    for(i = 0; i < 10; ++i)
        cin >> arr[i];
    cout << endl << "Standard Deviation = " << SD(arr); // calling function
    return 0;
}

#include <iostream>

#include <cmath>

using namespace std;

float SD(float values[]) // function for calculating standadr deviation

{

float sum = 0.0, mean, sd = 0.0;

int i;

for(i = 0; i < 10; ++i)

{

sum = sum + values[i]; // calculating sum

}

mean = sum/10; // finding mean.

for(i = 0; i < 10; ++i)

sd = sd + pow(values[i] - mean, 2); // calculating standard deviation

return sqrt(sd / 10);

}

int main()

{

int i;

float arr[10];

cout << "Enter 10 elements: ";

for(i = 0; i < 10; ++i)

cin >> arr[i];

cout << endl << "Standard Deviation = " << SD(arr); // calling function

return 0;

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

arr[] = it will hold entered elements.
value = it will hold a elements values.
i= for iteration.
sum= add all elements to find mean.
mean=hold the mean value.
sd= gives us standard deviation.

Now let us look method to find standard deviation step by step.

first or all take elements from user.
then pass these elements to function SD.
where first we calculate the mean (average) of each data set.
then,subtracting the mean from each number.
then,Square each deviation.
after that add all the squared deviations.
Divide the value obtained by the number of items in the data set.
Calculate the square root of the value obtained (Variance).
And at the return the sd to main function were we print standard deviation.

C++ Program to Access Elements of an Array Using Pointer

In this tutorial, we will learn to create a C++ program that will Access Elements of an Array Using Pointer using C++ programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators in C++ Programming.
Basic Input and Output function in C++ Programming.
Basic C++ programming.
For loop in C++ Programming.
Using pointer in C++ programming.

Array And Pointer:-

The array in the C++ programming language is a collection of similar data type elements. It can store multiple values in a single variable.

Pointer variables are used to access the element using the address of the variable.

Algorithm:-

STEP 1: START

STEP 2: INITIALIZE array[]

STEP 3: take input elements

STEP 4: create pointer

STEP 5: pass array to pointer

STEP 6: print array using pointer

STEP 7: Return 0.

STEP 8: END.

STEP 1: START

STEP 2: INITIALIZE array[]

STEP 3: take input elements

STEP 4: create pointer

STEP 5: pass array to pointer

STEP 6: print array using pointer

STEP 7: Return 0.

STEP 8: END.

Access Elements of an Array Using Pointer:-

In this program, we will create an array of five elements and take input from the user. Now the printing work of those elements will be done with the help of a pointer variable.

Pointer is a variable that can access elements another variable using its address.

Program:-

Access Elements of an Array Using Pointer.

/* C++ Program to Access Elements of an Array Using Pointer */
#include <iostream>
using namespace std;

int main()
{
   //declaring the variabes required for the program
   int arry[5];
   //taking input elements of the array from the user [five elements]
   cout << "Enter elements: ";
   
   for(int i = 0; i < 5; ++i)
      cin >> arry[i];
   //printing the elements of the array using the pointer type variable
   cout << "You entered: ";
   for(int i = 0; i < 5; ++i)
      cout << endl << *(arry + i);

   return 0;
}

/* C++ Program to Access Elements of an Array Using Pointer */

#include <iostream>

using namespace std;

int main()

{

//declaring the variabes required for the program

int arry[5];

//taking input elements of the array from the user [five elements]

cout << "Enter elements: ";

for(int i = 0; i < 5; ++i)

cin >> arry[i];

//printing the elements of the array using the pointer type variable

cout << "You entered: ";

for(int i = 0; i < 5; ++i)

cout << endl << *(arry + i);

return 0;

}

Output:-

In the above program, we have to first initialize the required variable.

arry = it will hold the elements in an array.
i = it will hold the integer value to control the array.

Taking input from the user in an array the element in the array.

Printing the elements of the array using the pointer.

C++ Program to Sort Elements in Lexicographical Order

In this tutorial, we will learn to create a c++ Program to Sort Elements in Lexicographical Order.

Prerequisites

Before starting with this program we assume that you are best aware of the following C ++ programming topics:

Operators.
Basic input/output.
Basic c++ programming.
Array and Multidimensional Array.
Loops.
Nested For loop.

What is Lexicographical Order?.

In Maths, the terminology lexicographic or lexicographical order is a Alphabetical order or the Dictionary ordered,more generally “elements of a ordered set(ascending order(a-z))”.

C++ Program to Sort Elements in Lexicographical Order.

In this program we will sort elements in Lexicographical Order using nested for loop.
first of all we declared and initialized the required variables after that user will prompt to input elements ,then we using different methods arrange all these Elements is in Lexicographical Order.
Here we takes 5 elements from the user and arrange them in lexicographical order using nested for loop.

#include <iostream>
using namespace std;
int main() {
   int i,j;
   string s[5], tmp; // declaring variables.
   cout<<"Enter 5 elements..."<<endl;

   for(i = 0; i < 5; ++i)
   cin>>s[i];   // getting 5 elements.
   for(i = 0; i < 4; ++i)
   for(j = i+1; j < 5; ++j) {
      if(s[i] > s[j]) {
         tmp = s[i];      // arranging them in Lexicographical order.
         s[i] = s[j];
         s[j] = tmp;      
      }
   }
   cout << "The elements in lexicographical order are... " << endl;
   for(int i = 0; i < 5; ++i)
   cout << s[i] << endl;   // printing in Lexicographical  order.
   return 0;
}

#include <iostream>

using namespace std;

int main() {

int i,j;

string s[5], tmp; // declaring variables.

cout<<"Enter 5 elements..."<<endl;

for(i = 0; i < 5; ++i)

cin>>s[i]; // getting 5 elements.

for(i = 0; i < 4; ++i)

for(j = i+1; j < 5; ++j) {

if(s[i] > s[j]) {

tmp = s[i]; // arranging them in Lexicographical order.

s[i] = s[j];

s[j] = tmp;

}

cout << "The elements in lexicographical order are... " << endl;

for(int i = 0; i < 5; ++i)

cout << s[i] << endl; // printing in Lexicographical order.

return 0;

}

Output

In the above program, we have first declared and initialized a set variables required in the program.

s = it will holds 5 elements.
tmp= holds temporary values.
i and j= for iterations.

In this program we will find Lexicographical Order of given elements by user.first of all in this statement we will ask the user to enter the 5 elements.

And we arrange the elements into Lexicographical Order using bubble sort algorithm.

Bubble Sort

This sorting algorithm are also called as sinking sort method,In this sorting algorithm terms repeatedly swapping the adjacent elements if they are in wrong order.

Finally the result printed in lexicographical order . This is given below −elements entered by user ,using algorithm we arrange them in sorted manner.

C++ Programs to Reverse Array Element Using Function

In this tutorial, we will learn to create a C++ program that will Reverse Array Element Using Function using C++ programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators in C++ Programming.
Basic Input and Output function in C++ Programming.
Basic C++ programming.
For loop in C++ Programming.
Functions in C++ Programming.

Reversing of the array.

The array stores multiple elements in a single variable using the different index values. All the array operations are performed on the index values for manipulation in an array. In this tutorial, we will reverse the elements of the array from start to end.

For example :-
Take an array 
A[]={ a , b , c , d }
The index of values are
a = 0;
b = 1;
c = 2;
d = 3;
now we will reverse that array by putting the first value to last and so on.
By reversing the index values.
it means new array will ne 
A[] = { d , c , b , a };

For example :-

Take an array

A[]={ a , b , c , d }

The index of values are

a = 0;

b = 1;

c = 2;

d = 3;

now we will reverse that array by putting the first value to last and so on.

By reversing the index values.

it means new array will ne

A[] = { d , c , b , a };

Algorithm:-

STEP 1: START

STEP 2: INITIALIZE arr[] = { 1, 2, 3, 4, 5 }

STEP 3: length= sizeof(arr)/sizeof(arr[0])

STEP 4: PRINT ARRAY NORMAL

STEP 5: REVERSING ARRAY

STEP 6: PRINT "REVERSE ORDER OF ARRAY IS AS FOLLOWS"

STEP 7: RETURN 0.

STEP 8: END.

STEP 1: START

STEP 2: INITIALIZE arr[] = { 1, 2, 3, 4, 5 }

STEP 3: length= sizeof(arr)/sizeof(arr[0])

STEP 4: PRINT ARRAY NORMAL

STEP 5: REVERSING ARRAY

STEP 6: PRINT "REVERSE ORDER OF ARRAY IS AS FOLLOWS"

STEP 7: RETURN 0.

STEP 8: END.

Programs to Reverse Array Element Using Function:-

In the program, First, we will initialize the elements of an array. Then we will reverse that array using C++ Programming Language.

Program:-

To Reverse Array Element Using Function

#include <iostream>
#include <algorithm>
using namespace std;
 
// Utility function to print contents of an array 
void print(int arr[], int n)
{
    for (int i = 0; i < n; i++) {
        cout << arr[i] << " ";
    }
}
 
// Utility function to reverse elements of an array
void reverse(int arr[], int n) {
    reverse(arr, arr + n);
}
 
int main()
{
    //declaring the variables for the program.
    int arr[] = { 1, 2, 3, 4, 5 };
    
    //finding the size of array.
    int n = sizeof(arr)/sizeof(arr[0]);
    //Printing the normal array.
     cout << "Elements in array " ;
    for (int i = 0; i < n; i++) {
        cout  << arr[i] << " " <<endl;
    }
    //passing the array to the reverse function
    reverse(arr, n);
    //Printing the out array
    cout << "Reverse Elements in array " ;
    print(arr, n);
 
    return 0;
}

#include <iostream>

#include <algorithm>

using namespace std;

// Utility function to print contents of an array

void print(int arr[], int n)

{

for (int i = 0; i < n; i++) {

cout << arr[i] << " ";

}

// Utility function to reverse elements of an array

void reverse(int arr[], int n) {

reverse(arr, arr + n);

}

int main()

{

//declaring the variables for the program.

int arr[] = { 1, 2, 3, 4, 5 };

//finding the size of array.

int n = sizeof(arr)/sizeof(arr[0]);

//Printing the normal array.

cout << "Elements in array " ;

for (int i = 0; i < n; i++) {

cout << arr[i] << " " <<endl;

}

//passing the array to the reverse function

reverse(arr, n);

//Printing the out array

cout << "Reverse Elements in array " ;

print(arr, n);

return 0;

}

Output:-

In the above program, we have first initialized the required variable

arr = it will hold the elements in an array.
n = it will hold the number of elements in an array.
i = it will hold the integer value to control the array.

Printing elements of the array

Calling of user-defined function in program.

Program Code for reverse function.

Program Code for Print function.

C++ Programs to Reverse Array Elements

In this tutorial, we will learn to create a c++ program to reverse an array entered by user at run-time using c++ programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators.
Looping statements.
Basic input/output.
Basic c++ programming
For Loop.

What is array?

An Array is a collection variable elements that can store multiple values in a single variable of same type.

Programs to Reverse Array Elements.

In this program , elements of an Array will be reverse . First of all user will be prompted to enter array elements and will we reverse the elements of array.

#include<iostream>
using namespace std;

int main()
{
int num;
cout<< "enter size of array"; // taking the size of array
cin >> num;
int arr[num],i;
cout<<"enter elements"; // getting values 
for(i = 0; i < num; i++)
{
cin >> arr[i];
}
cout << "Reversed array is:\n"; // reversing array.
for(i = num-1; i >= 0; i--)
{
cout << arr[i] << " ";
}
cout << endl;
return 0;

}

#include<iostream>

using namespace std;

int main()

{

int num;

cout<< "enter size of array"; // taking the size of array

cin >> num;

int arr[num],i;

cout<<"enter elements"; // getting values

for(i = 0; i < num; i++)

{

cin >> arr[i];

}

cout << "Reversed array is:\n"; // reversing array.

for(i = num-1; i >= 0; i--)

{

cout << arr[i] << " ";

}

cout << endl;

return 0;

}

Output

C++ Programs to Reverse Array Elements

In the above program, we have first declared and initialized a set variables required in the program.

num = it will hold size of array.
arr[]= it will hold multiple elements.
i = for iteration of loop.

In our program, we print the elements of the array in reverse order.
i.e the last element of array should be displayed first,
followed by second last element and so on.First of all we take a number as input from user to entered number store it in an array.Declare array of size equal to inputted num .
And now Input the array elements into the variable arr[].

And after that traverse the array in reverse from last to first and print the array element in reverse order that’s it.

C++ Programs to Find Duplicate Array Element

In this tutorial, we will learn to create a c++ program that find the Duplicate Array Element using c++ programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators.
looping statements.
Basic input/output.
Basic c++ programming
For Loop.
Array.
Function.

What Is Array ?

An Array is a collection of similar data type containing collection of elements (values or variables), each identified by one Array index value, Array is a data structure that hold collection of elements.

C++ Programs to Find Duplicate Array Element.

In this program ,we will find duplicate elements in a Array .First of all user will be prompted to enter a the size or Array and after that user will give elements and we will find the repeating elements in a given Array. Let see the code for finding duplicate values.

#include <iostream>

using namespace std;
void duplicate_element(int arr[], int num) // finding duplicate values
{
int i, j;
printf("Repeating elements are following: ");
for(i = 0;i < num;i++)
{
  for(j = i+1;j < num;j++)
  {
    if(arr[i] == arr[j])
    {
     cout << arr[j] << " ";
    }
  }
}
}
int main()
{
int no; 
cout<<"enter the size of array";
cin >> no; // taking size of array
int ele[no];  
int i;
cout<<"\n enter elements:";  // taking elements.
for(i = 0; i < no; i++)
{
cin >> ele[i];
}
duplicate_element(ele,no); // passing value to function
return 0;
}

#include <iostream>

using namespace std;

void duplicate_element(int arr[], int num) // finding duplicate values

{

int i, j;

printf("Repeating elements are following: ");

for(i = 0;i < num;i++)

{

for(j = i+1;j < num;j++)

{

if(arr[i] == arr[j])

{

cout << arr[j] << " ";

}

int main()

{

int no;

cout<<"enter the size of array";

cin >> no; // taking size of array

int ele[no];

int i;

cout<<"\n enter elements:"; // taking elements.

for(i = 0; i < no; i++)

{

cin >> ele[i];

}

duplicate_element(ele,no); // passing value to function

return 0;

}

Output

C++ Programs to Find Duplicate Array Element

In the above program, we have first declared and initialized a set variables required in the program.

no = it will hold size of array
ele = it will hold a value of array.
i & j = for iteration.
arr= it will hold a value of array.
num= it will hold total number of array value.

And in the next statement user will be prompted to enter size of a Array and value of Array.which will be assigned to variable ‘no’ and in ‘ele’ respectively.

and

Now ,loop through the size given by user and take all values supply by user in ele variable.Afterword pass this value to function.

and within the function in each iteration we will compare values of array to find the occurrence of a similar elements and each matching condition we print the matched values .

This process will continue until loop ends within the function, and at last we will print the total number occurrence of a Duplicate values.

C++ Programs to Sum of Array Elements

In this tutorial, we will learn to create a C++ program that will Calculate Sum of array elements using C++ programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators.
looping statements.
Basic input/output.
Basic c++ programming
For Loop.
String.
Array.

What is array?

An Array is a collection variable elements that can store multiple values in a single variable of same type.In Computer Science,an array is a data structure, or simply an array, is a data structure consisting of a collection of elements.

C++ Programs to Sum of Array Elements

In this program we will add array elements. We would first declared and initialized the required variables. Next, we would prompt user to input elements of array .Later we add all the elements of Array.

#include<iostream>
using namespace std;
int main ()
{
    int a[100], num, i, sum = 0; // declaring variables
    cout << "Enter the size of the array : ";
    cin >> num;   
    cout << "\nEnter the elements of the array : "; // taking elements of array
    for (i = 0; i < num; i++)
    cin >> a[i];
    for (i = 0; i < num; i++)
    {
        sum += a[i];     // adding vaules or array
    }
    cout << "\nSum of  elements : " << sum;   // printing sum.....
    return 0;
}

#include<iostream>

using namespace std;

int main ()

{

int a[100], num, i, sum = 0; // declaring variables

cout << "Enter the size of the array : ";

cin >> num;

cout << "\nEnter the elements of the array : "; // taking elements of array

for (i = 0; i < num; i++)

cin >> a[i];

for (i = 0; i < num; i++)

{

sum += a[i]; // adding vaules or array

}

cout << "\nSum of elements : " << sum; // printing sum.....

return 0;

}

Output

C++ Programs to Sum of Array Elements

In the above program, we have first declared and initialized a set variables required in the program.

a[] = it will hold entered elements.
sum =hold sum or elements.
i = for iteration.
num= number of elements in array.

In our program, we will take value form user in array , after taking values we will add elements of an array.
First of all we take size of an array from user in variable num

after taking size of array user will prompted to enter the elements of array.

The variables ‘sum’ is initialized as 0.Then asked user to enter the array elements.Within the loop, the elements are stored in the array ‘=a[]’.
And in next loop the sum is calculated and stored in sum.As shown in below image.

in every iteration. sum is calculated ans stored in variable sum .At the end the value of sum will be printed.

c++ program to merge two arrays

C++ Program to Merge Two Arrays

In this tutorial, we will learn to create a C++ program that will merge two arrays using C++ programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators in C++ Programming.
Basic Input and Output function in C++ Programming.
Basic C++ programming.
For loop in C++ Programming.

Algorithm:-

1. Declaring the variables and arrays.

2. Taking input in Array.

3. Merging the arrays into a single array.

4. Printing the merged array.

5. End Program.

1. Declaring the variables and arrays.

2. Taking input in Array.

3. Merging the arrays into a single array.

4. Printing the merged array.

5. End Program.

Merging of two arrays:-

In Today’s we will merge two different arrays into a single array with a very simple and shortcode. First, we will take two arrays in input and then we will merge them into one single array using short C++ programming.

Program:-

To find Merge the two array elements into a single array.

// C++ program to merge two sorted arrays/
#include<iostream>
using namespace std;
 
void mergeArrays(int arr1[], int arr2[], int n1,
                             int n2, int arr3[])
{
    int i = 0, j = 0, k = 0;
 
    // Traverse both array
    while (i<n1 && j <n2)
    {
        // Check if current element of first
        // array is smaller than current element
        // of second array. If yes, store first
        // array element and increment first array
        // index. Otherwise do same with second array
        if (arr1[i] < arr2[j])
            arr3[k++] = arr1[i++];
        else
            arr3[k++] = arr2[j++];
    }
 
    // Store remaining elements of first array
    while (i < n1)
        arr3[k++] = arr1[i++];
 
    // Store remaining elements of second array
    while (j < n2)
        arr3[k++] = arr2[j++];
}
 
//main function code
int main()
{ 
    //declaring the variables for the program
    int arr1[] = {1, 3, 5, 7};
    int n1 = sizeof(arr1) / sizeof(arr1[0]);
 
    int arr2[] = {2, 4, 6, 8};
    int n2 = sizeof(arr2) / sizeof(arr2[0]);
 
    int arr3[n1+n2];
    mergeArrays(arr1, arr2, n1, n2, arr3);
 
    cout << "Array after merging" <<endl;
    for (int i=0; i < n1+n2; i++)
        cout << arr3[i] << " ";
 
    return 0;
}

				
					
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						// C++ program to merge two sorted arrays/
#include<iostream>
using namespace std;
 
void mergeArrays(int arr1[], int arr2[], int n1,
                             int n2, int arr3[])
{
    int i = 0, j = 0, k = 0;
 
    // Traverse both array
    while (i<n1 && j <n2)
    {
        // Check if current element of first
        // array is smaller than current element
        // of second array. If yes, store first
        // array element and increment first array
        // index. Otherwise do same with second array
        if (arr1[i] < arr2[j])
            arr3[k++] = arr1[i++];
        else
            arr3[k++] = arr2[j++];
    }
 
    // Store remaining elements of first array
    while (i < n1)
        arr3[k++] = arr1[i++];
 
    // Store remaining elements of second array
    while (j < n2)
        arr3[k++] = arr2[j++];
}
 
//main function code
int main()
{ 
    //declaring the variables for the program
    int arr1[] = {1, 3, 5, 7};
    int n1 = sizeof(arr1) / sizeof(arr1[0]);
 
    int arr2[] = {2, 4, 6, 8};
    int n2 = sizeof(arr2) / sizeof(arr2[0]);
 
    int arr3[n1+n2];
    mergeArrays(arr1, arr2, n1, n2, arr3);
 
    cout << "Array after merging" <<endl;
    for (int i=0; i < n1+n2; i++)
        cout << arr3[i] << " ";
 
    return 0;
}

					

			

Output:-

In the above program, we have first initialized the required variable

arr1[] = it will hold the elements in an array1.
arr2[] = it will hold the elements in an array2.
arr3[] = it will hold the elements in an array3.
mergeArrays[] = it will hold the elements in an array.
i = it will hold the integer value to control array using for loop.
j = it will hold the integer value to control array using for loop.
k = it will hold the integer value to control array using for loop.

Taking input for array1 as well as array2.

Merging the two arrays.

Main function Code.

C++ Programs to Pass Array In Function

C++ Programs to Array In Function

In this tutorial, we will learn to create a C++ program that will Pass Array In Function using C++ programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators in C++ Programming.
Basic Input and Output function in C++ Programming.
Basic C++ programming.
For loop in C++ Programming.
Functions in C++ Programming.

Algorithm:-

STEP 1: START

STEP 2: INITIALIZE arr[] = { 1, 2, 3, 4, 5 }

STEP 3: length= sizeof(arr)/sizeof(arr[0])

STEP 4: PRINT ARRAY NORMAL

STEP 5: REVERSING ARRAY

STEP 6: PRINT "REVERSE ORDER OF ARRAY IS AS FOLLOWS"

STEP 7: RETURN 0.

STEP 8: END.

STEP 1: START

STEP 2: INITIALIZE arr[] = { 1, 2, 3, 4, 5 }

STEP 3: length= sizeof(arr)/sizeof(arr[0])

STEP 4: PRINT ARRAY NORMAL

STEP 5: REVERSING ARRAY

STEP 6: PRINT "REVERSE ORDER OF ARRAY IS AS FOLLOWS"

STEP 7: RETURN 0.

STEP 8: END.

Program to pass Array In Function:-

As we all know array is a collection of similar data type elements. we can perform many different operations on arrays in c++ programming. In today’s program, we will reverse a given array using a user-defined function. Bypassing that array to a function.

Program Code:-

Pass Array In Function To Reverse Array Element Using Function

#include <iostream>
#include <algorithm>
using namespace std;
 
// Utility function to print contents of an array 
void print(int arr[], int n)
{
    for (int i = 0; i < n; i++) {
        cout << arr[i] << " ";
    }
}
 
// Utility function to reverse elements of an array
void reverse(int arr[], int n) {
    reverse(arr, arr + n);
}
 
int main()
{
    //declaring the variables for the program.
    int arr[] = { 1, 2, 3, 4, 5 };
    
    //finding the size of array.
    int n = sizeof(arr)/sizeof(arr[0]);
    //Printing the normal array.
     cout << "Elements in array " ;
    for (int i = 0; i < n; i++) {
        cout  << arr[i] << " " <<endl;
    }
    //passing the array to the reverse function
    reverse(arr, n);
    //Printing the out array
    cout << "Reverse Elements in array " ;
    print(arr, n);
 
    return 0;
}

#include <iostream>

#include <algorithm>

using namespace std;

// Utility function to print contents of an array

void print(int arr[], int n)

{

for (int i = 0; i < n; i++) {

cout << arr[i] << " ";

}

// Utility function to reverse elements of an array

void reverse(int arr[], int n) {

reverse(arr, arr + n);

}

int main()

{

//declaring the variables for the program.

int arr[] = { 1, 2, 3, 4, 5 };

//finding the size of array.

int n = sizeof(arr)/sizeof(arr[0]);

//Printing the normal array.

cout << "Elements in array " ;

for (int i = 0; i < n; i++) {

cout << arr[i] << " " <<endl;

}

//passing the array to the reverse function

reverse(arr, n);

//Printing the out array

cout << "Reverse Elements in array " ;

print(arr, n);

return 0;

}

Output:-

In the above program, we have first initialized the required variable

arr = it will hold the elements in an array.
n = it will hold the number of elements in an array.
i = it will hold the integer value to control the array.

Printing elements of the array

Calling of user-defined function in the program.

Program Code for reverse function & Print function.

C++ Programs to Sort Array Element

In this tutorial, we will learn to create a C++ program that will sort Array Elements using C++ programming.

Prerequisites

Before starting with this tutorial we assume that you are best aware of the following C++ programming topics:

Operators.
looping statements.
Basic input/output.
Basic c++ programming
For Loop.
Array.

What is array?

C++ Programs to Sort Array Element.

In this program we will sort Array elements. We would first declared and initialized the required variables. then we would prompt user to input elements of array .Later we sort an Array elements in ascending order.

#include <iostream>
using namespace std;
 
int main()
{
    int a[100],num, i, j, tmp; // declaring variables
 
    // Reading the size of the array
    cout<<"Enter size of an array: "; //taking the size of array
    cin>>num;
 
    //Reading elements of array
    cout<<"Enter elements in an array: ";  // getting elements of array
    for(i=0; i<num; i++)
    {
        cin>>a[i];
    }

    for(i=0; i<num; i++)     //Sorting an array in ascending order
    {
        for(j=i+1; j<num; j++)
        {
            if(a[j] < a[i])
            {
                tmp = a[i];
                a[i] = a[j];
                a[j] = tmp;
            }
        }
    }
    cout<<"Elements of array in sorted ascending order:"<<endl;
    for(i=0; i<num; i++)
    {
        cout<<a[i]<<" " ;
    }
 
    return 0;
}

#include <iostream>

using namespace std;

int main()

{

int a[100],num, i, j, tmp; // declaring variables

// Reading the size of the array

cout<<"Enter size of an array: "; //taking the size of array

cin>>num;

//Reading elements of array

cout<<"Enter elements in an array: "; // getting elements of array

for(i=0; i<num; i++)

{

cin>>a[i];

}

for(i=0; i<num; i++) //Sorting an array in ascending order

{

for(j=i+1; j<num; j++)

{

if(a[j] < a[i])

{

tmp = a[i];

a[i] = a[j];

a[j] = tmp;

}

cout<<"Elements of array in sorted ascending order:"<<endl;

for(i=0; i<num; i++)

{

cout<<a[i]<<" " ;

}

return 0;

}

Output

C++ Programs to Sort Array Element

In the above program, we have first declared and initialized a set variables required in the program.

a[] = it will hold entered elements.
num =it will hold size of array.
i and j= for iteration.
tmp= it hold temporary values.

In our program, we will take 5 values form user in an array , after taking these values we will sort the elements of an array.
First of all we take size of an array from user in variable num.

After taking size of an array user will prompted to enter the elements of array.

Here we will use selection sort algorithm sorts an array by repeatedly finding the minimum element from unsorted part and putting it at the beginning.

In every iteration sorted value is arranging in a[i] .At the end the value of sorted array will be printed.