C Program to Swap two number without using temporary variable

C program to Swap two Numbers Without Using Temporary Variable

#include 
int main()
{
    double a, b; // initialization constant variables
    printf("Enter a: "); // user enter number
    scanf("%lf", &a); // storing value of user number
    printf("Enter b: "); // user enter number
    scanf("%lf", &b); // storing value of user number

    // Swapping process
    a = a - b;
    b = a + b;
    a = b - a;

    printf("After swapping, a = %.2lf\n", a); //swaping 
    printf("After swapping, b = %.2lf", b); //swaping
    return 0;
}

Output

Enter a: 5.25
Enter b: -6.5
After swapping, a = -6.5
After swapping, b = 5.25

Happy Coding