C++ Example - Swap Two Numbers |

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C++ Example - Swap Two Numbers

C++ Examples

Below we use two methods to swap two variables: using a temporary variable and without using a temporary variable.

Example - Using a Temporary Variable

#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;
}

The output of the above program execution is:

Before swapping:
a = 5, b = 10

After swapping:
a = 10, b = 5

Example - Without Using a Temporary Variable

#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;
}

The output of the above program execution is:

Before swapping:
a = 5, b = 10

After swapping:
a = 10, b = 5

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