1.+重载
class Time
{
private:
int num;
public:
Time operator+(const Time & t) const;
};
Time Time::operator+(const Time & t) const
{
Time sum;
sum.num = num + t.num;
return sum;
}
Time name1(50);
Time name2(100);
Time name3;
name3 = name1 + name2; // 该程序自动调用上面的函数。 实现num的相加