C++实现用指针复制字符串

#include <iostream>
using namespace std;
int main() {
  char str1[] = "I love CHINA!",str2[20],*p1,*p2;
  p1 = str1;
  p2 = str2;
  char *p4="Wo ye Cuo";
  while(*p1!='\0'){
    *p2++=*p1++;
  }
  *p2='\0';
  p1=str1;
  cout<<str2<<endl;
  p2=str2;
  cout << "str1 is: "<<p1<<endl;
  cout << "str2 is: "<<p2<<endl;
  return 0;
}