题解 | #比较字符串大小#

#include <iostream>
using namespace std;

int mystrcmp(const char* src, const char* dst);

int main() {

    char s1[100] = { 0 };
    char s2[100] = { 0 };

    cin.getline(s1, sizeof(s1));
    cin.getline(s2, sizeof(s2));

    int ret = mystrcmp(s1, s2);

    cout << ret << endl;

    return 0;
}

int mystrcmp(const char* src, const char* dst) {

    // write your code here......
    int i = 0;
    while (src[i] != '\0' && dst[i] != '\0') {
	  	//逐字符比较
        if (src[i] < dst[i]) {
            return -1;
        }else if (src[i] > dst[i]) {
            return 1;
        }else {
            i++;
        }
    }
  	//判断是src较短还是dst较短
    if (src[i] == '\0' && dst[i] != '\0') {
        return -1;
    }else if (src[i] != '\0' && dst[i] == '\0') {
        return 1;
    }else {
        return 0;
    }
}