pointer.cpp

来自「C++ Primer Plus(第五版)中文版 书籍的大量经典代码实例 对于初学」· C++ 代码 · 共 24 行

// pointer.cpp -- our first pointer variable
#include <iostream>
int main()
{
    using namespace std;
    int updates = 6;        // declare a variable
    int * p_updates;        // declare pointer to an int

    p_updates = &updates;   // assign address of int to pointer

// express values two ways
    cout << "Values: updates = " << updates;
    cout << ", *p_updates = " << *p_updates << endl;

// express address two ways
    cout << "Addresses: &updates = " << &updates;
    cout << ", p_updates = " << p_updates << endl;

// use pointer to change value
    *p_updates = *p_updates + 1;
    cout << "Now updates = " << updates << endl;
    return 0; 
}