gistfile1.c

#include <stdio.h>

int main(void)
{
  char *p;
  char buf[2];

  buf[1] = '\0';
  p = buf;

  int i;
  for(i=0; i<32; i++) {
    *p = "0123456789abcdef"[i & 0xf];
    printf("%s",p);
  }
  printf("\n");

}