pointer.cc

来自「资深C++讲师授课代码」· CC 代码 · 共 31 行

#include <iostream>
using namespace std;

int main()
{
	int a, b;
	int* p=&a;
	*p = 100;
	p = &b;
	*p = 200;
	cout << "a=" << a << endl;
	cout << "b=" << b << endl;
	char c;
	double d;
	//p = &c;
	//p = &d;
	const int e=123, f=456;
	//p = &e;
	const int* q;//q是个用来保存常量地址的变量    
	q = &e;
	//*q = 111;//ERROR!!
	cout << *q << endl;
	q = &f;
	cout << *q << endl;
	int* const r=&a;
	cout << *r << endl;
	*r = 333;
	cout << "a=" << a << endl;
}