【C语言】memcpy函数的实现

<span style="font-size:18px;">#include<stdio.h>
#include<assert.h>
void *my_memcopy(void *str1,void const *str2,int len)
{
	char *tmp1=(char*)str1;
	char *tmp2=(char*)str2;
	void *ret=str1;
	assert(str1);
    assert(str2);

   while(len--)
   {
	*tmp1++ = *tmp2++;
   }
   return ret;
	
}
int main()
{
	char q[] ="abcdjgfjjyty";
	char p[] = "ddddddd";//bbit-teh
	my_memcopy(q,p,6);
	printf("%s\n",my_memcopy(q,p,6));
	return 0;
}</span>