自己实现memcpy

#include<stdio.h>#include<stdlib.h>#include<assert.h>void memcpy_my(void *dst,const void *src,size_t len){char *s = src;char *d = dst;assert(len >0);while(len--){*d++ = *s++;}return ;}int main(){char buff[1024]={0};char arr_t[]="hello word!";memcpy_my(buff,arr_t,sizeof(arr_t));printf("buff = %s\n",buff);return 0;}