c program swapping two numbers without using third variable

[Bhavesh Nariya]

#include <stdio.h>
int main()
{
  int x = 10, y = 5;

  // Code to swap 'x' and 'y'

  y=x+y-(x=y);

 printf("After Swapping: x = %d, y = %d", x, y);

  return 0;
}

[Hiroshe]

You're still introducing a new space in ram. Also, you're doing extra instuctions making it more inefficient if optimizations don't pick up on it (I feel like most probably wont). Not to mention it's harder to read.

It's a cute party trick I suppose.