程序源码

#include <stdio.h>
int mStrcpy(char *s, char *s1, int len);
int main()
{char str[2][20];int i, j;printf("请输入2个字符串！\n");for(i=0; i<2; i++)gets(str[i]);printf("字符串大小比较结果：%d\n", mStrcpy(&str[0][0], &str[1][0], strlen(str) ) );return 0;
}
int mStrcpy(char *s, char *s1, int len)
{int i, val;for(i=0; i<len; i++)if(s[i] != s1[i])return s[i] - s1[i];return 0;
}

运行结果