CPP : Swap Numbers

1.. Swap Numbers (Using 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;

}

Output

Before swapping.

a = 5, b = 10

After swapping.

a = 10, b = 5

2: Swap Numbers Without Using Temporary Variables

#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;
}

Output

Before swapping.

a = 5, b = 10

After swapping.

a = 10, b = 5