程序代码：

class hgold
{
private:
    int f_gold;
public:
    hgold(int val);
    int get_gold();
    hgold(hgold& c_hgold);
    std::ostream& operator<<(hgold c_gold);
};
hgold::hgold(int val)
{
    f_gold = val+500;
}
int hgold::get_gold()
{
    return f_gold;
}
std::ostream& hgold::operator<<(hgold c_gold)
{
    std::cout << c_gold.get_gold();
    return std::cout;
}
int main()
{
    hgold gold{100};
    std::cout << "gold的数量为===>" << gold;
}

[此贴子已经被作者于2023-4-28 11:43编辑过]

程序代码：

#include <iostream>

class hgold
{
public:
    hgold( int val );
    int value() const;

private:
    int gold_;
};

hgold::hgold( int val ) : gold_(val+500)
{
}

int hgold::value() const
{
    return gold_;
}

std::ostream& operator<<( std::ostream& os, const hgold& h )
{
    return os << h.value();
}

int main( void )
{
    hgold gold{100};
    std::cout << "gold的数量为 " << gold << std::endl;
}

[此贴子已经被作者于2023-4-28 19:03编辑过]