pointeruse.cpp

来自「《24学时精通c++》的光盘内容」· C++ 代码 · 共 26 行

 // Listing 9.2 Using pointers
 #include <iostream>
 using std::cout; // this file uses std::cout

 int main()
 {
     int myAge;         // a variable
     int * pAge = NULL;    // a pointer

     myAge = 5;
     pAge = &myAge;     // assign address of myAge to pAge
     cout << "myAge: " << myAge << "\n";
     cout << "*pAge: " << *pAge << "\n\n";

     cout << "*pAge = 7\n";
     *pAge = 7;         // sets myAge to 7
     cout << "*pAge: " << *pAge << "\n";
     cout << "myAge: " << myAge << "\n\n";

     cout << "myAge = 9\n";
     myAge = 9;
     cout << "myAge: " << myAge << "\n";
     cout << "*pAge: " << *pAge << "\n";

     return 0;
 }