birdclasspointers.cpp

来自「C++ sample code, for the book: C++ blac」· C++ 代码 · 共 38 行

#include <iostream>
#include <string>
using namespace std;

class bird_class {     
public:         
    string name;              
    int number_seen;        
    void increment_count(){number_seen++;}
    bird_class(string text);
};

bird_class::bird_class(string text)
{
    name = text;
    number_seen = 0;
}

int main()
{
    bird_class orioles("oriole");
    bird_class *robins_pointer = new bird_class("robin");

    void (bird_class::*pointer)(void);
    pointer = &bird_class::increment_count;

    (orioles.*pointer)();
    (robins_pointer->*pointer)();

    cout << "Number of " << orioles.name << "s seen: " << orioles.number_seen << endl;
    cout << "Number of " << robins_pointer->name << "s seen: " 
        << robins_pointer->number_seen << endl;

    return 0;
}