Algorithm

  1. Declare variables:
    num1, num2, and temp are declared to store the two numbers and a temporary variable for swapping.

    Input two numbers:
    The user is prompted to input the values for num1 and num2.

    Swap the numbers using a temporary variable:
    The values of num1 and num2 are swapped using a temporary variable temp. This is a common technique to exchange values between two variables.

    Display the swapped numbers:
    The program prints the values of num1 and num2 after swapping to confirm the swap.


Code Examples

#1 Code Example-C++ Programing Swap Numbers (Using Temporary Variable)

Code - C++ Programming

#include <iostream>
using namespace std;

int main()
{
    int a = 5, b = 10, temp;

    cout << "Before swapping." << endl;
    cout << "a = " << a << ", b = " << b << endl;

    temp = a;
    a = b;
    b = temp;

    cout << "\nAfter swapping." << endl;
    cout << "a = " << a << ", b = " << b << endl;

    return 0;
}
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Output

x
–
+
cmd
Before swapping.
a = 5, b = 10
After swapping.
a = 10, b = 5

#2 Code Example- C++ Programing Swap Numbers Without Using Temporary Variables

Code - C++ Programming

#include <iostream>
using namespace std;

int main()
{
    
    int a = 5, b = 10;

    cout << "Before swapping." << endl;
    cout << "a = " << a << ", b = " << b << endl;

    a = a + b;
    b = a - b;
    a = a - b;

    cout << "\nAfter swapping." << endl;
    cout << "a = " << a << ", b = " << b << endl;

    return 0;
}
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Output

x
–
+
cmd
Before swapping.
a = 5, b = 10
After swapping.
a = 10, b = 5
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Demonstration

C++ Programing Example  to Swap Two Numbers- DevsEnv