#include <stdio.h>

int main(void) {
   int x;
   int y;

   x = (y = 23); // sets y, then sets x
   printf("%i %i\n", x, y);

   (x = 42) = 371; // x is set to 42 and then set to 371
   printf("%i\n", x);
   return 0;
}