Swap two values

Swap two Values with third Variable

#include <iostream>
using namespace std;

int main () {
    int x, y, temp;

    cout << "Enter a value for x: ";
    cin >> x;
    cout << "Enter a value for y: ";
    cin >> y;

    cout << "Before swapping:\nX: " << x << "\nY: " << y << endl;  
    
    // swapping numbers
    temp = x;
    x = y;
    y = temp;

    cout << "After swapping:\nX: " << x << "\nY: " << y;    
    
    return 0;
}

Output

Enter a value for x: 22
Enter a value for y: 44
Before swapping:
X: 22
Y: 44
After swapping:
X: 44
Y: 22

Swap two Values without third Variable

#include <iostream>
using namespace std;

int main () {
    int x, y;

    cout << "Enter a value for x: ";
    cin >> x;
    cout << "Enter a value for y: ";
    cin >> y;

    cout << "Before swapping:\nX: " << x << "\nY: " << y << endl;  
    
    // swapping numbers
    x = x + y;   
    y = x - y;   
    x = x - y; 

    cout << "After swapping:\nX: " << x << "\nY: " << y;    
    
    return 0;
}

Output

Enter a value for x: 22
Enter a value for y: 44
Before swapping:
X: 22
Y: 44
After swapping:
X: 44
Y: 22