1  #include <stdio.h>
       2  
       3  
       4  
       5  int
       6  main (void)
       7  {
       8    int res = 0;
       9    char buf[100];
      10  
      11  #define TEST(nr, result, format, args...) \
      12    if (sprintf (buf, format, ## args) != result)				      \
      13      {									      \
      14        printf ("test %d failed (\"%s\",  %d)\n", nr, buf, result);	      \
      15        res = 1;								      \
      16      }
      17  
      18    TEST (1, 2, "%d", -1);
      19    TEST (2, 2, "% 2d", 1);
      20    TEST (3, 3, "%#x", 1);
      21    TEST (4, 2, "%+d", 1);
      22    TEST (5, 2, "% d", 1);
      23    TEST (6, 2, "%-d", -1);
      24    TEST (7, 2, "%- 2d", 1);
      25    TEST (8, 3, "%-#x", 1);
      26    TEST (9, 2, "%-+d", 1);
      27    TEST (10, 2, "%- d", 1);
      28  
      29    return res;
      30  }