Char** ptr 到Char*的转换

#include <string>
#include <iostream>
#include<stdio.h>

using namespace std;

void main()
{
	char *p = "hello world";
	char **pp = &p;

	cout<<p<<endl;
	cout<<&p<<endl;
	cout<<&pp<<endl;
	cout<<*(&pp)<<endl;
	cout<<&(*pp)<<endl;

	int size = sizeof(&(*pp));
    
	char buf[12] ={0};

	strcpy(buf, (char*) *pp);

	//sprintf(buf, "%s", *pp);

	char *ptr = (char*) *pp;
	cout<<ptr<<endl;
	cout<<&ptr<<endl;
   
	return;
}