Category Archives: C++ Programs

c plus plus programs

C++ Program to Calculate Power of a Number

In this tutorial, we will learn to create a C++ program that will find the Power of a given number using C++ programming.

Prerequisites

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

Operators.
Precedence.
Looping statements.
Basic input/output functions.
Basic c++ programming.

Calculating Power of a Number.

let’s have a look Logic behind to finding the power of any number using C++ programming.

Example

Input:
take value at base : 3
take value at exponent : 3
So power of any number baseⁿ given as base*base*…..*base (n-times). Here base is called base and n is called the exponent.Here we will write a C++ program to find the power of a given number.

Program to find power of any number.

In this program we will find power of any given number using for loop. We would first declared and initialized the required variables. Next, we would prompt user to input the number and power of number .Then we will find the power of given number.

#include <iostream>
using namespace std;

int main()
{
int base,expo,i; //declaring variables
long power=1;

cout<<"Enter base  :";
cin>>base; //taking base

cout<<"\nEnter Exponent :";
scanf("%d",&expo); //  taking power

for(i=1;i<=expo;i++) // traverse the loop till exponent
{
power *= base;//power=power*base // multiplying base with power
}
cout<<"Result "<<power; // required output
return 0;
}

#include <iostream>

using namespace std;

int main()

{

int base,expo,i; //declaring variables

long power=1;

cout<<"Enter base :";

cin>>base; //taking base

cout<<"\nEnter Exponent :";

scanf("%d",&expo); // taking power

for(i=1;i<=expo;i++) // traverse the loop till exponent

{

power *= base;//power=power*base // multiplying base with power

}

cout<<"Result "<<power; // required output

return 0;

}

Output

C++ Program to Calculate Power of a Number

Point to remember : The above program will works only if the Power is a positive integer (number).

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

base = it hold the value of base
expo = it will hold the power
power= it will hold the result.

Let see the logic of program step by step.

1. Input base and exponents from user, and put it in two variables base and expo.

2. Initialize variable that will store power to one (power=1).
3.within the loop value of i start from 1 to expo, increment loop by 1 in each iteration. The structure look like.

4.For every iteration the value of power multiply with base.

5.Finally after iteration we get the answer in variable Power.

In this tutorial we understand how to write a program without using Power Function In C++ to calculate power of a given number.

C++ Program to Find All Roots of a Quadratic Equation

In this tutorial, we will learn to create a C++ program that will find Second Order Quadratic Equation using C++ programming.

Prerequisites

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

Operators
Basic input/output.
Basic C Programming
Inbuilt library functions.

What Is Second Order Quadratic Equation?

In particular, it is a second-degree polynomial equation, since it has the greatest power is two.In algebra said a quadratic polynomial, a polynomial of degree 2.

C++ Program to Find All Roots of a Quadratic Equation

In this program we will Find All Roots of a Quadratic Equation. First of all we declared and initialized the required variables.Next,we would prompt user to input the values of a,b and c then with the help of sqrt() function we will calculate the first and second root or equations.

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

int main()
{
double a,b,c,rt1,rt2; //declaring variables.
cout<<"enter values of a , b and c";
cin>>a>>b>>c; // taking values from user
rt1 = (-b + sqrt(b*b-4.*a*c) ) / (2.*a); //calculating quadratic
rt2 = (-b - sqrt(b*b-4.*a*c) ) / (2.*a);
cout<<"\n First root is "<<rt1;  //printing roots 1 and 2 values
cout<<"\n Second root is "<<rt2;  
return 0;
}

#include <iostream>

#include <cmath>

using namespace std;

int main()

{

double a,b,c,rt1,rt2; //declaring variables.

cout<<"enter values of a , b and c";

cin>>a>>b>>c; // taking values from user

rt1 = (-b + sqrt(b*b-4.*a*c) ) / (2.*a); //calculating quadratic

rt2 = (-b - sqrt(b*b-4.*a*c) ) / (2.*a);

cout<<"\n First root is "<<rt1; //printing roots 1 and 2 values

cout<<"\n Second root is "<<rt2;

return 0;

}

Output

C++ Program to Find All Roots of a Quadratic Equation

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

a,b,c = for holding coordinates
rt1= shows first root.
rt2= shows second root.

In this program first of we prompted user to input values of a,b and c

after getting the values of a,b and c and with the help of inbuilt function sqrt() and mathematical formula we know to calculate all Roots of a Quadratic Equation.

whose value define in math.h header file we going to find the Second Order Quadratic Equation.

as we know the formula of Quadratic Equation. we will use formula to get first and second root of given coordinates using c++ program.

C++ Programs to Find Greatest Number

C++ Program to Find the Greatest Number

In this tutorial, we will learn to create a C++ program that will Find Greatest Number 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.
Conditional statement in C++ programming.

Program to Find the Greatest Number

In c++ programming, it is possible to take multiple integer inputs from the user and Find the Greatest Number with the help of a very short program. The C++ language has many types of header libraries which has supported function in them with the help of these files the programming is easy. But today we will Find the Greatest Number from the taken numbers from the user using c++ programming.

Algorithm:-

With the help of this program, we can Find the Greatest Number.

1. Declaring the variables for the program.

2. Taking the input numbers.

3. Checking the greatest number.

4. Printing the greatest number.

5. End the program.

1. Declaring the variables for the program.

2. Taking the input numbers.

3. Checking the greatest number.

4. Printing the greatest number.

5. End the program.

Program to Find the Greatest Number:-

#include <iostream>
using namespace std;

int main() 
{
    //declaring the variables for the program.
    float no1, no2, no3;
    /* 
    no1, no2, no3 will hold 
    the values of three numbers 
    from the user taken in the input
    */
    //Taking the input from the user three numbers
    cout << "Enter three numbers for comparision: ";
    cin >> no1 >> no2 >> no3;

    if(no1 >= no2 && no1 >= no3)
        cout << "Largest number: " << no1;

    if(no2 >= no1 && no2 >= no3)
        cout << "Largest number: " << no2;
    
    if(no3 >= no1 && no3 >= no2)
        cout << "Largest number: " << no3;
  
    return 0;
}

#include <iostream>

using namespace std;

int main()

{

//declaring the variables for the program.

float no1, no2, no3;

no1, no2, no3 will hold

the values of three numbers

from the user taken in the input

//Taking the input from the user three numbers

cout << "Enter three numbers for comparision: ";

cin >> no1 >> no2 >> no3;

if(no1 >= no2 && no1 >= no3)

cout << "Largest number: " << no1;

if(no2 >= no1 && no2 >= no3)

cout << "Largest number: " << no2;

if(no3 >= no1 && no3 >= no2)

cout << "Largest number: " << no3;

return 0;

}

Output:-

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

no1 = it will hold the integer value.
no2 = it will hold the integer value.
no3 = it will hold the integer value.

Input numbers for the program.

Program Logic Code.

Printing output for the greatest number.

C++ Program to Find Factorial

In this tutorial, we will learn to create a C++ program that will Find Factorial of a number using C++ programming.

Prerequisites

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

Operators.
Basic input/output.
Basic c++ programming
If-else Statement.

What is Factorial ?

Factorial of a number n is the product of all the positive integers numbers.

Example: The factorial of 6 is 120.
6! = 6* 5 * 4 * 3 * 2 *1
6! = 720.

Factorial of 0 and 1 is 1.and factorial of negative number doesn’t exist.

C++ Program to Find Factorial

In this program we will find factorial of a given number . We would first declared and initialized the required variables. Next, we would prompt user to input a number .Later we will Find Factorial.

#include <iostream>
using namespace std;

int main() {
    int num,i;
    float fact = 1.0; // declaring variables

    cout << "Enter a positive number: ";
    cin >> num;  // taking input number

    if (num < 0) // condition for negative number..
    {
        cout << "Factorial of a negative number doesn't exist.";
    }
    else  // finding factorial
    {
        for(i = 1; i <= num; ++i) 
        {
            fact *= i;
        }
        cout << "Factorial of " << num << " = " << fact;    
    }

    return 0;
}

#include <iostream>

using namespace std;

int main() {

int num,i;

float fact = 1.0; // declaring variables

cout << "Enter a positive number: ";

cin >> num; // taking input number

if (num < 0) // condition for negative number..

{

cout << "Factorial of a negative number doesn't exist.";

}

else // finding factorial

{

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

{

fact *= i;

}

cout << "Factorial of " << num << " = " << fact;

}

return 0;

}

Output

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

num = it will hold entered number.
fact = it will hold a factorial of a number.
i = for iteration.

In our program, we will find factorial of a given number.
First of all we take a number as input from user and store the value in variable num.

And now we will check first that the given number is greater than 1 or not if not we show message in below.

And after that in else we will fin the factorial of a given number.

In our program above, the user is promoted to enter a positive integer.In the our program, the loop runs from 1 to num. In each iteration , fact is multiplied with i. fact=fact*i and final value of fact is the product of all numbers between 1 to num.

C++ Programs to Generate Fibonacci Series

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.

What is Fibonacci Series?

The Fibonacci series is a series that is strongly related to Binet’s formula (golden ratio). in the Fibonacci series, the series starts from 0, 1 and then the third value is generated by adding those numbers,

Algorithm:-

STEP 1: START

STEP 2: INITIALIZE n

STEP 3: Sending the message to inter the value of n from user

STEP 4: Grabbing the n number element from the user

STEP 5: Using that number in for loop and calculations

STEP 6: Generating the fibonacci series

STEP 7: Printing the series.

STEP 8: Return 0.

STEP 10: END.

STEP 1: START

STEP 2: INITIALIZE n

STEP 3: Sending the message to inter the value of n from user

STEP 4: Grabbing the n number element from the user

STEP 5: Using that number in for loop and calculations

STEP 6: Generating the fibonacci series

STEP 7: Printing the series.

STEP 8: Return 0.

STEP 10: END.

Programs to Generate Fibonacci Series:-

In this program, we take the number of elements for the series from the user. Then we will generate the Fibonacci series from the below program code.

Program:-

Program to Generate Fibonacci Series

#include <iostream>
using namespace std;

int main() 
{
    //declaring the variables required for the programs.
    int n, t1 = 0, t2 = 1, nterm = 0;
    
    //Taking input number from the user for upto n terms.
    cout << "Enter the number of terms: ";
    cin >> n;
    
    //Printing the fibonacci Series upto the n terms.
    cout << "Fibonacci Series: ";

    for (int i = 1; i <= n; ++i) {
        // Prints the first two terms.
        if(i == 1) {
            cout << t1 << ", ";
            continue;
        }
        if(i == 2) {
            cout << t2 << ", ";
            continue;
        }
        nterm = t1 + t2;
        t1 = t2;
        t2 = nterm;
        //Printing the terms fo fibonacci Series
        cout << nterm << ", ";
    }
    return 0;
}

#include <iostream>

using namespace std;

int main()

{

//declaring the variables required for the programs.

int n, t1 = 0, t2 = 1, nterm = 0;

//Taking input number from the user for upto n terms.

cout << "Enter the number of terms: ";

cin >> n;

//Printing the fibonacci Series upto the n terms.

cout << "Fibonacci Series: ";

for (int i = 1; i <= n; ++i) {

// Prints the first two terms.

if(i == 1) {

cout << t1 << ", ";

continue;

}

if(i == 2) {

cout << t2 << ", ";

continue;

}

nterm = t1 + t2;

t1 = t2;

t2 = nterm;

//Printing the terms fo fibonacci Series

cout << nterm << ", ";

}

return 0;

}

Output:-

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

t1 = it will hold the integer value.
t2 = it will hold the integer value.
nterm = it will hold the integer value.
n = it will hold the integer value.
i = it will hold the integer value to control the array.

Generating the fibonacci series.

Program Code for Printing the series.

C++ Programs to Find Number Of Digits

C++ Program to Find the number of digits.

In this tutorial, we will learn to create a C++ program that will Find the Number Of Digits 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.
String functions in c++ programming.

Find the number of digits in the number.

As we all know the c++ programming is a very powerful language. In the c++ programming language, we have many pre-defined functions for arithmetic operations. but today we will count the number of digits in a number without using the mod operator.

With the help of this program, we can find the number of digits in numbers.

Algorithm Find the Number Of Digits:-

1. Declaring the variables required for the program. 

2. Taking the input number from the user for the program. 

3. Calculating the total number of digits in the numbers. 

4. Calculating the sum of all the numbers in the given number. 

5. Printing the result numbers. 6. End Program

1. Declaring the variables required for the program.

2. Taking the input number from the user for the program.

3. Calculating the total number of digits in the numbers.

4. Calculating the sum of all the numbers in the given number.

5. Printing the result numbers. 6. End Program

Program to Find the Number Of Digits:-

// W3 Adda C++ Tutorial 
// c++ program to find number of digits in a number
#include <bits/stdc++.h>
using namespace std;
 
int flagDigit(long long n)
{
    //Declaring the variables required for the function
    int flag = 0;
    while (n != 0)
    {
        n = n / 10;
        ++flag;
    }
    return flag;
}
 
// Driver code
int main(void)
{
     //Declaring the variables required for the program
     //Defining the value for the variable
    long long n = 345289467;
    //Printing output for the program 
    cout << "Number of digits : " << flagDigit(n);
    return 0;
}

// W3 Adda C++ Tutorial

// c++ program to find number of digits in a number

#include <bits/stdc++.h>

using namespace std;

int flagDigit(long long n)

{

//Declaring the variables required for the function

int flag = 0;

while (n != 0)

{

n = n / 10;

++flag;

}

return flag;

}

// Driver code

int main(void)

{

//Declaring the variables required for the program

//Defining the value for the variable

long long n = 345289467;

//Printing output for the program

cout << "Number of digits : " << flagDigit(n);

return 0;

}

Output:-

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

n = it will hold the long integer.
flag = it will hold the integer value for numbers.

Taking input number to the user.

Calling function for reverse and printing

Finding the number of digits with the help of using a user-defined function.

C++ Programs to Reverse any Number

In this tutorial, we will learn to create a C++ program that will Reverse any Number 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.
Conditional Statements in C++ programming.
Arithmetic operations in C++ Programming.

Program to Reverse any Number:-

In c++ programming, it is possible to take integer input from the user and Reverse any Number with the help of a C++ program. The reversing of a number means the digits of a number will be swapped from the first position to the last position. The C++ language has many types of header libraries that have supported functions in them with the help of these files the programming is easy.

With the help of this program, we can Reverse any Number.

Algorithm:-

1. Declaring the variables for the program.

2. Taking the input number from the user.

3. Calculating the number is a Palindrome number or not.

4. Printing the result.

5. End the program.

1. Declaring the variables for the program.

2. Taking the input number from the user.

3. Calculating the number is a Palindrome number or not.

4. Printing the result.

5. End the program.

Program to Reverse any Number:-

#include <iostream>
using namespace std;

int main() 
{
    //Declaring the variables for the program.
    int n, revno = 0, rmdr;
    
    //Taking integer number in input from the user for reverse that number 
    cout << "Enter an integer: ";
    cin >> n;
    
    //Reversing the number
    while(n != 0) {
        rmdr = n%10;
        revno = revno*10 + rmdr;
        n /= 10;
    }
 
    //Printing the output number
    cout << "Reversed Number = " << revno;

    return 0;
}

#include <iostream>

using namespace std;

int main()

{

//Declaring the variables for the program.

int n, revno = 0, rmdr;

//Taking integer number in input from the user for reverse that number

cout << "Enter an integer: ";

cin >> n;

//Reversing the number

while(n != 0) {

rmdr = n%10;

revno = revno*10 + rmdr;

n /= 10;

}

//Printing the output number

cout << "Reversed Number = " << revno;

return 0;

}

Output:-

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

num= it will hold the integer value of the input.
n = it will hold the integer value.
digit = it will hold the integer value.
rev = it will hold the integer value.

Input message for the user for the integer value.

Program Logic Code.

Printing output Reverse any Number.

C++ Programs to Print Table of any Number

C++ Program to Print Table of any Number

In this tutorial, we will learn to create a C++ program that will Print a Table of any Number 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.

Program to Print Table of any Number:-

As we all know the integer, float, or double value in c++ programming. In c++ programming, we can take the input from the user in numbers format. In today’s program, we will take input in number format. Secondly, we will Print a Table of any number with the help of a small program. The numbers are the most useful terminology in any programing language. For number/arithmetic manipulation in c++ programming, there are many predefined functions available.

Integers are the most use-full data types in any programming language. The integer values are used with operators to perform the best operations in programming.

With the help of this program, we can take input and print the Table of any Number.

Algorithm:-

1. Declaring the variables for the program.

2. Taking the input numbers from the user in number format.

3. Generating the table and storing it in a variable.

4. End program.

1. Declaring the variables for the program.

2. Taking the input numbers from the user in number format.

3. Generating the table and storing it in a variable.

4. End program.

Program:-

/* C++ Program to Print Table of any Number */ 
#include <iostream>
using namespace std;

int main()
{
    //declaring the variables for the program
    int n;
    //taking input number from the user 
    cout << "Enter a positive integer: ";
    cin >> n;
    //no will store the integer value of the input number 
    
    //calculating and printing the table for the reqiured number
    for (int i = 1; i <= 10; ++i)
    {
        //Printing the output for the program.
        cout << no << " * " << i << " = " << n * i << endl;
    }
    
    return 0;
}

/* C++ Program to Print Table of any Number */

#include <iostream>

using namespace std;

int main()

{

//declaring the variables for the program

int n;

//taking input number from the user

cout << "Enter a positive integer: ";

cin >> n;

//no will store the integer value of the input number

//calculating and printing the table for the reqiured number

for (int i = 1; i <= 10; ++i)

{

//Printing the output for the program.

cout << no << " * " << i << " = " << n * i << endl;

}

return 0;

}

Output:-

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

n = it will hold the input number value from the user.
i = it will hold the integer value.

Taking Input numbers from the user.

Calculating the table of given numbers and Printing the output.

C++ Program to Generate Multiplication Table

In this tutorial, we will learn to create a C++ program that will Generate a Multiplication Table 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.

Programfor generating the table:-

As we all know the integer, float, or double value in c++ programming. In c++ programming, we can take the input from the user in numbers format. In today’s program, we will take input in number format. Secondly, we will generate a Multiplication Table with the help of a small program. The numbers are the most useful terminology in any programing language. For number/arithmetic manipulation in c++ programming, there are many predefined functions available.

Algorithm:-

1. Declaring the variables required for the program.

2. Taking the input number from the user in number format for the generation of the table.

3. Send that variable to the for loop so that we can fing the table.

4. Generating the table and storing it in a variable.

5. Printing the table of the taken input number from the user.

1. Declaring the variables required for the program.

2. Taking the input number from the user in number format for the generation of the table.

3. Send that variable to the for loop so that we can fing the table.

4. Generating the table and storing it in a variable.

5. Printing the table of the taken input number from the user.

Program:-

/* C++ Program to Generate Multiplication Table */ 
#include <iostream>
using namespace std;

int main()
{
    //declaring the variables for the program
    int n;
    //taking input number from the user 
    cout << "Enter a positive integer: ";
    cin >> n;
    //no will store the integer value of the input number 
    
    //calculating and printing the table for the reqiured number
    for (int i = 1; i <= 10; ++i)
    {
        //Printing the output for the program.
        cout << no << " * " << i << " = " << n * i << endl;
    }
    
    return 0;
}

/* C++ Program to Generate Multiplication Table */

#include <iostream>

using namespace std;

int main()

{

//declaring the variables for the program

int n;

//taking input number from the user

cout << "Enter a positive integer: ";

cin >> n;

//no will store the integer value of the input number

//calculating and printing the table for the reqiured number

for (int i = 1; i <= 10; ++i)

{

//Printing the output for the program.

cout << no << " * " << i << " = " << n * i << endl;

}

return 0;

}

Output:-

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

n = it will hold the input number value from the user.
i = it will hold the integer value.

Taking Input numbers from the user.

Calculating the table of given numbers and Printing the output.

C++ Program to Find Largest Number Among Three Numbers

In this tutorial, we will learn to create a C++ program that will find Largest Number Among Three Numbers 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.
Conditional statement in C++ programming.

Program to Find Largest Number Among Three Numbers

In c++ programming, it is possible to take numerical input from the user and find Largest Number Among Three Numbers with the help of a very small amount of code. The C++ language has many types of header libraries which has supported function in them with the help of these files the programming is easy. But today we will find Largest Number Among Three Numbers using c++ programming.

Algorithm:-

With the help of this program, we can find Largest Number Among Three Numbers.

1. Declaring the variables for the program.

2. Taking the input numbers.

3. Checking the greatest number.

4. Printing the greatest number.

5. End the program.

1. Declaring the variables for the program.

2. Taking the input numbers.

3. Checking the greatest number.

4. Printing the greatest number.

5. End the program.

Program to find the Smallest of Three Numbers:-

#include <iostream>
using namespace std;

int main() 
{
    //declaring the variables for the program.
    float no1, no2, no3;
    /* 
    no1, no2, no3 will hold 
    the values of three numbers 
    from the user taken in the input
    */
    //Taking the input from the user three numbers
    cout << "Enter three numbers for comparision: ";
    cin >> no1 >> no2 >> no3;

    if(no1 >= no2 && no1 >= no3)
        cout << "Largest number: " << no1;

    if(no2 >= no1 && no2 >= no3)
        cout << "Largest number: " << no2;
    
    if(no3 >= no1 && no3 >= no2)
        cout << "Largest number: " << no3;
  
    return 0;
}

#include <iostream>

using namespace std;

int main()

{

//declaring the variables for the program.

float no1, no2, no3;

no1, no2, no3 will hold

the values of three numbers

from the user taken in the input

//Taking the input from the user three numbers

cout << "Enter three numbers for comparision: ";

cin >> no1 >> no2 >> no3;

if(no1 >= no2 && no1 >= no3)

cout << "Largest number: " << no1;

if(no2 >= no1 && no2 >= no3)

cout << "Largest number: " << no2;

if(no3 >= no1 && no3 >= no2)

cout << "Largest number: " << no3;

return 0;

}

Output:-

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

no1 = it will hold the integer value.
no2 = it will hold the integer value.
no3 = it will hold the integer value.

Input numbers for the program.

Program Logic Code.

Printing output for the greatest number.

C++ Programs to Swap two numbers

In this tutorial, we will learn to create a C++ program that will Swap two numbers 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.

Swapping of Numbers:-

In swapping we swap the data of two variables. In this program, we will use the third variable to swap the data of the first and second variables.

Let us understand with an example.

a = 100, b = 200

After line 1: flag = a
flag = 100

After line 2: a = b
a = 200

After line 3 : b = flag
b = 100

a = 100, b = 200

After line 1: flag = a

flag = 100

After line 2: a = b

a = 200

After line 3 : b = flag

b = 100

Algorithm for the program:-

1. Declare the variables for the program.

2. Taking the input numbers from the user.

3. Swapping that number using third variable.  

4. Print the Result.

5. End the program.

1. Declare the variables for the program.

2. Taking the input numbers from the user.

3. Swapping that number using third variable.

4. Print the Result.

5. End the program.

C++ Programs to Swap two numbers

In every programming language, numbers play a very important role in a programming language. As we all know the c++ is a very powerful language. With the help of the c++ programming language, we can make many programs. We can perform many input-output operations using c++ programming. In today’s tutorial, we take the input numbers from the user. Then we will swap two Numbers with the help of the third variable in the c++ programming language.

With the help of this program, we can Swap two numbers.

Program to swap two Numbers:-

#include <iostream>
using namespace std;

int main()
{
    //declaring the variables for the program for the program
    int first = 5; //first integer value for the program
    int second = 6; //second integer value for the program
    int flag; //temporary variable for the program
    
    //printing the numbers before the swapping
    cout << "Before swapping." << endl;
    cout << "a = " << first << ", b = " << second << endl;
    
    //Swapping the numbers
    flag = first;
    first = second;
    second = flag;
    
    //printing after swapping
    cout << "\nAfter swapping." << endl;
    cout << "a = " << first << ", b = " << second << endl;

    return 0;
}

#include <iostream>

using namespace std;

int main()

{

//declaring the variables for the program for the program

int first = 5; //first integer value for the program

int second = 6; //second integer value for the program

int flag; //temporary variable for the program

//printing the numbers before the swapping

cout << "Before swapping." << endl;

cout << "a = " << first << ", b = " << second << endl;

//Swapping the numbers

flag = first;

first = second;

second = flag;

//printing after swapping

cout << "\nAfter swapping." << endl;

cout << "a = " << first << ", b = " << second << endl;

return 0;

}

Output:-

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

first= it will hold the integer value.
second = it will hold the integer value.
flag = it will hold the integer value.

Printing the numbers before the swapping of values.

Swapping the numbers using a third variable with simple logic.

Printing the output swapped numbers from the program.

C++ Programs to Check Even and Odd Number

C++ Program to Check Even and Odd Number

In this tutorial, we will learn to create a C++ program that will Check Even and Odd numbers 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.
Conditional Statements in C++ programming.
Arithmetic operations in C++ Programming.

What is an even and odd number?

Even numbers are those numbers that are completely divisible by 2. which means the reminder should be zero. And odd numbers are those numbers that cannot be completely divisible by 2.

Algorithm:-

1. Declaring the variables for the program.

2. Taking the input integer number from the user.

3. Checking the Even & Odd numbers from the input.

4. Printing the result number.

5. End Program.

1. Declaring the variables for the program.

2. Taking the input integer number from the user.

3. Checking the Even & Odd numbers from the input.

4. Printing the result number.

5. End Program.

Program to Check Even and Odd Number

In this program, we will take an integer input number from the user, and then we will use it in the program with conditional statements to find whether the number is even or odd. As per the program calculations.

With the help of this program, we can Check Even and Odd numbers.

Program:-

/* C++ Programs to Check Even and Odd Number */
#include <iostream>
using namespace std;

int main() 
{
  /* Declaring the variable for the program to check even and odd number */
  int n;
  /* Taking the input number from the user */
  cout << "Enter an integer: ";
  cin >> n;
  /* Checking the number even or odd */
  if ( n % 2 == 0)
  /* Printing the even number in the output */
    cout << n << " is even.";
  else
  /* Printing the odd number in the output */
    cout << n << " is odd.";

  return 0;
}

/* C++ Programs to Check Even and Odd Number */

#include <iostream>

using namespace std;

int main()

{

/* Declaring the variable for the program to check even and odd number */

int n;

/* Taking the input number from the user */

cout << "Enter an integer: ";

cin >> n;

/* Checking the number even or odd */

if ( n % 2 == 0)

/* Printing the even number in the output */

cout << n << " is even.";

else

/* Printing the odd number in the output */

cout << n << " is odd.";

return 0;

}

Output:-

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

n = it will hold the integer value.

Input number from the user.

Checking if even number.

Checking for an odd number.