1  typedef struct sreal
       2  {
       3    unsigned sig;		/* Significant.  */
       4    int exp;		/* Exponent.  */
       5  } sreal;
       6  
       7  sreal_compare (sreal *a, sreal *b)
       8  {
       9    if (a->exp > b->exp)
      10      return 1;
      11    if (a->exp < b->exp)
      12      return -1;
      13    if (a->sig > b->sig)
      14      return 1;
      15    if (a->sig < b->sig)
      16      return -1;
      17    return 0;
      18  }
      19  
      20  sreal a[] = {
      21     { 0, 0 },
      22     { 1, 0 },
      23     { 0, 1 },
      24     { 1, 1 }
      25  };
      26  
      27  int main()
      28  {
      29    int i, j;
      30    for (i = 0; i <= 3; i++) {
      31      for (j = 0; j < 3; j++) {
      32        if (i < j && sreal_compare(&a[i], &a[j]) != -1) abort();
      33        if (i == j && sreal_compare(&a[i], &a[j]) != 0) abort();
      34        if (i > j && sreal_compare(&a[i], &a[j]) != 1) abort();
      35      }
      36    }
      37    return 0;
      38  }