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 return -(a->sig < b->sig); 16} 17 18sreal a[] = { 19 { 0, 0 }, 20 { 1, 0 }, 21 { 0, 1 }, 22 { 1, 1 } 23}; 24 25int main() 26{ 27 int i, j; 28 for (i = 0; i <= 3; i++) { 29 for (j = 0; j < 3; j++) { 30 if (i < j && sreal_compare(&a[i], &a[j]) != -1) abort(); 31 if (i == j && sreal_compare(&a[i], &a[j]) != 0) abort(); 32 if (i > j && sreal_compare(&a[i], &a[j]) != 1) abort(); 33 } 34 } 35 return 0; 36} 37