#include <stdio.h>

int main(void) {

  int a = 0, b = 0, 
      c = 2, d = 2,
      res1, res2, res3, res4;

  res1 = a++;  res2 = ++b;
  res3 = c--;  res4 = --d;  

  printf("a: %d, b: %d, c: %d, d: %d\n", a,b,c,d);
  /* 1 1 1 1 */

  printf("res1: %d, res2: %d, res3: %d, res4 = %d\n", res1, res2, res3, res4);  
  /* 0 1 2 1 */
  
  return 0;
}