模拟实现strcmp
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
int mystrcmp(const char *src, const char *dst) {
int ret = 0;
assert(src != NULL);
assert(dst != NULL);
while (!(ret = *(unsigned char *)src - *(unsigned char *)dst) && *dst) {
++src;
++dst;
}
if (ret < 0) {
ret = -1;
}
else if (ret > 0) {
ret = 1;
}
return ret;
}
int main() {
char str1[1024] = { 1,2,3,4,5 };
char str2[1024] = { 1,2,3,4,5 };
int ret = mystrcmp(str1, str2);
printf("%d\n", ret);
system("pause");
return 0;
}