productclassfriend.cpp

来自「C++ sample code, for the book: C++ blac」· C++ 代码 · 共 37 行

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

class product 
{     
    int number;        
public:         
    string name;              
    int get_number(){return number;}
    void set_number(int n){number = n;}
    product(string text, int count);
    friend void display(product p);
};

product::product(string text, int count)
{
    name = text;
    number = count;
}

void display(product p)
{
    cout << "Number of " << p.name << ": " << p.number << endl;
}

main()
{
    product product_object("oranges", 200);

    display(product_object);

    return 0;
}