swap 2 integers without using temporary variable
#include <stdio.h>
int main() {
int a = 5, b = 10;
printf("Before swapping: a = %d, b = %d\n", a, b);
a = a + b;
b = a - b;
a = a - b;
printf("After swapping: a = %d, b = %d\n", a, b);
return 0;
}