函数实现my_memcpy.

#include<stdio.h>int my_memcmp(char const *a,char const *b,int n){int i=1;while(*a==*b){i++;if(i>n)break;a++;b++;}if(*a<*b)return -1;else if(*a>*b) return 1;elsereturn 0;}int main(){char *arr="abcd";char *brr="abbe";printf("%d\n",my_memcmp(arr,brr,3));return 0;}