#include <stdlib.h>
#include <stdio.h>

#define min(b,c) ((b) < (c) ? (b) : (c))

/*
 * A potential hazard of macros is the side affect operators in
 * argument expressions.  In this example, if b is less than c,
 * b gets incremented twice, which was not intended.
 *
 * a = min(b++, c) gets translated to
 *
 * a = (b++) < (c) ? (b++) : (c)
 * 
 */

int main(void)
{
  int b = 4;
  int c = 6;
  int return_val;

  printf("Input value of b: %d\n", b);
  printf("Input value of c: %d\n", c);
  
  return_val = min(b++,c);

  printf("Output value of b: %d\n", b);
  printf("Output value of c: %d\n", c);

  printf("Return value from min(b,c): %d\n", return_val);

  return EXIT_SUCCESS;
}