指针变量

#include <iostream>

using namespace std;

int main()
{
//声明变量和指针变量
int a, b, c, p;
//指针变量ip指向变量a
a = 100;
p = &a; //使指针变量 ip 指向变量a
cout << "a = " << a << endl;
cout << "p = " << *p << endl;
cout << "p = " << p << endl;

//指针变量ip指向变量b
p = &b;
b = 200;
cout << "b=" << b << endl;
cout << "*p = " << *p << endl;
cout << "p = " << p << endl;

//指针变量ip指向变量c
p = &c;
*p = a + b;
cout << "c = " << c << endl;
cout << "*p = " << *p << endl;
cout << "p = " << p << endl;

}