1typedef struct sreal 2{ 3 unsigned sig; /* Significant. */ 4 int exp; /* Exponent. */ 5} sreal; 6 7sreal_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 20sreal a[] = { 21 { 0, 0 }, 22 { 1, 0 }, 23 { 0, 1 }, 24 { 1, 1 } 25}; 26 27int 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} 39