c语言strcpy实现

#include<stdio.h>

char * my_strcpy(char *dest, const char *src)
{
char *ptemp = dest;

while((*(ptemp ++) =  *(src++)) !='\0' );
return ptemp;
}
int main(void)
{
char dest[20];
char *src = "Hello";
my_strcpy(dest,src);
printf("%s\n",dest);
return 0;
}