birdclassstaticdata.cpp

来自「C++ sample code, for the book: C++ blac」· C++ 代码 · 共 35 行

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

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

int bird_class::number_seen = 0;        

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

int main()
{
    bird_class orioles("oriole");
    bird_class robins("robin");

    orioles.increment_count();
    robins.increment_count();

    cout << "Number of birds seen: " << bird_class::number_seen << endl;

    return 0;
}