Question

我有两节课;一个名为Date，另一个名为University。 Date类有两个重载运算符：operator<<和operator>>来接收数据并打印出来。

Date.h

#ifndef DATE_H_
#define DATE_H_

#include <iostream>
#include "University.h"
using namespace std;

class Date {
public:
Date(); // constructor
void setDate( int d, int m, int y ); // set day, month, year
friend ostream & operator<<(ostream & out, Date & x); // print date format "month dd, yyyy (example: January 11, 2013)
friend istream & operator>>(istream & In, Date & x); // to read date
private:
int day; 
int month; 
int year; // 
};
#endif

Date.CPP
#include <iostream>
#include "Date.h"
#include "University.h"
using namespace std;



Date::Date()
{}


void Date::setDate( int d, int m, int y )
{
    day=d;
    month=m;
    year=y;
}




ostream & operator<<(ostream & out, Date & x)
{
    out<< x.month << "/" << x.day << "/" << x.year ;
    return out;
}

istream & operator>>(istream & in, Date & x)
{
    in>> x.day >> x.month >> x.year ;
    return in;
}

University类有一个名为Date的{{1}}类型的对象，我必须使用它来打印 date 以及大学姓名和位置。

这是班级establishDate：

University

如何使用对象// University.h class University { public: University (); // constructor friend ostream & operator<<(ostream & out, University & x); // print the university data friend istream & operator>>(istream & in, University & x); // to read university data private: const static string uname; string location; Date establishDate; }; const string uname = "London University";？

Answer 1

我想你想要的东西如下：

ostream & operator<<(ostream & out, University & x)
{
   out<< x.uname << " in " << x.location << " has been established in: " << x.establishDate.month << "/" << x.establishDate.day << "/" << x.establishDate.year ;
   return out;
}

这很有效，因为运营商是朋友，因此可以访问私人会员。

如何使用另一个类的对象

1 个答案: