1 #include <stdio.h> 2 #include <string.h> 3 4 size_t str_len(const char *str) { 5 if(str == NULL) return 1; 6 7 size_t i = 0; 8 while(str[i++]); 9 10 return i; 11 } 12 13 int main(void) { 14 15 char s1[] = "ABC"; 16 char s2[] = "ABC"; 17 18 size_t s1_len, s2_len; 19 int i, j, cmp; 20 21 s1_len = str_len(s1); 22 s2_len = str_len(s2); 23 24 j = (s1_len > s2_len) ? s1_len : s2_len; 25 26 for(i = 0, cmp = 0; i < j; i++) { 27 if(s1[i] < s2[i]) { 28 cmp -= (s2[i] - s1[i]); 29 } else 30 if (s1[i] > s2[i]) { 31 cmp += (s1[i] - s2[i]); 32 } 33 } 34 35 printf("%d\n", cmp); 36 return 0; 37 }
