重载<<操作符错误C2804：二进制'运算符<<参数太多 [英] Overloading the << operator error C2804: binary 'operator <<' has too many parameters

问题描述

这是我的类：

#ifndef CLOCK_H
#define CLOCK_H
using namespace std;

class Clock
{
    //Member Variables

    private: int hours, minutes;

    void fixTime( );

    public:
        //Getter & settor methods.
        void setHours(int hrs); 
        int getHours() const;
        void setMinutes(int mins); 
        int getMinutes() const; 

        //Constructors
        Clock(); 
        Clock(int);
        Clock(int, int);
        //Copy Constructor
        Clock(const Clock &obj);
        //Overloaded operator functions
        void operator+(const Clock &hours);
        void operator+(int mins);
        void operator-(const Clock &hours);
        void operator-(int minutes1);
        ostream &operator<<(ostream &out, Clock &clockObj); //This however is my problem where i get the error C2804. Saying that it has to many parameters 
};
#endif

这个函数应该是一个时钟的值不同时间。

All this function is supposed to do is out the values of a clock at different times.

推荐答案

ostream &operator<<(ostream &out, Clock &clockObj); 

应为

friend ostream &operator<<(ostream& out, Clock &clockObj);    

定义在类外。

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