Question

试试这个

Date.h

#ifndef DATE_H
#define DATE_H

#include<string>
using namespace std;

class Date{

  public:
    Date(int month, int day, int year);

    int getMonth() const;
    int getDay() const;
    int getYear() const;

  private:
    int month;
    int day;
    int year;
};

#endif

Date.cpp

#include "Date.h"
#include<string>
using namespace std;

Date::Date(int month, int day, int year) {
    this->month = month;
    this->day = day;
    this->year = year;
}

int Date::getMonth() const{
  return month;
}

int Date::getDay() const{
  return day;
}

int Date::getYear() const{
  return year;
}

Appointment.cpp

#include "Appointment.h"
#include "Date.h"
#include<sstream>
#include<string>
using namespace std;

Appointnment::Appointment(String description, int month, int day, int yr, int hr, int min)
{
    this->description = description;
    this->month = month;
    this->day = day;
    this->yr = yr;
    this->hr = hr;
    this->min = min;
}

void Appointinment::getDate()
{
    //cannot change calling object nor its date object member, just return it
}

}

我试图实现getDate()功能，但由于此类被指定为约会，我无法理解如何返回Date。我有什么资源可以解决这个具体问题吗？

Answer 1

你的代码看起来不错。但是当返回soemthing时，你需要一个指向Data的指针，或者引用Date或直接对象。

以下任何一种都可以使用：

Date Appointinment::getDate() const

const Date& Appointinment::getDate() const

const Date* Appointinment::getDate() const

从背景来判断，也许首先是你想要的。

Answer 2

const Date& Appointinment::getDate()
{
     return Date(this->month, this->day, this->yr);
}

这是最常见的方式。

返回另一个类文件中的对象

2 个答案: