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strncmp
int ho_strncmp(const char *s1, const char *s2, size_t n) {
char *s = (char *)s1;
int c;
while (n-- && !(c = *s - *s2) && *s)
s++, s2++;
return c;
}
int main() {
printf("%d\n", ho_strncmp("https", "http", 5));
printf("%d\n", strncmp("https", "http", 5));
printf("%d\n", ho_strncmp("http", "https", 5));
printf("%d\n", strncmp("http", "https", 5));
printf("%d\n", ho_strncmp("http", "https", 4));
printf("%d\n", strncmp("http", "https", 4));
return 0;
}
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原文地址:http://my.oschina.net/guonaihong/blog/402118