C Program to swap 2 numbers without using temporary variable

#include <stdio.h>
int main(){
    int a, b;
    printf("Enter the value of a : ");
    scanf("%d", &a);
    printf("Enter the value of b : ");
    scanf("%d", &b);

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

    printf("a : %d\nb : %d", a, b);
    return 0;
}