自訂一個strcpy (c++)

#include <iostream>
using namespace std;

char *strcpy2(char *dest, const char *ori);
int main(void){
        char tmp[] = "adfadfaf";
        strcpy2(tmp, "hello world");
        cout<<tmp;
        return 0;
}
char *strcpy2(char *dest, const char *ori){
        assert(dest!=NULL && ori !=NULL);
        char *addr= dest;
        while((*dest++ = *ori++)!='\0');
        return addr;
}