我收到这些错误:

no matching function for call to 'Date::Date()'
Appointment(){

and

no matching function for call to 'Time::Time()'
Appointment(){

Appointment.h

// Appointment.h -- Class Appointment   UPDATE as needed
//
using namespace std;#include "Time.h"

#include "Date.h"

#ifndef APPOINTMENT_H
#define APPOINTMENT_H

class Appointment: public Date, public Time {
    private: int howLong;
    public: Appointment() {
        month;
        day;
        year;
        hour;
        minute;
        howLong;

    }

    virtual void print() {
        cout << howLong << " ";
    }

};

#endif
时间
//Time.h -- Class Time UPDATE  as needed
using namespace std;#include<iostream>

#ifndef TIME_H
#define TIME_H

class Time {
    private:
        int hour;
    int minute;
    public:
        Time(int, int) {
            hour;
            minute;
        }
    virtual void print() {
        cout << hour << " " << minute << " ";
    }

};
#endif
日期.h
// Date.h -- Class Date    UPDATE  as needed

#ifndef DATE_H
#define DATE_H

class Date {
    private:
        int month;
    int day;
    int year;
    public:
        Date(int, int, int) {
            month;
            day;
            year;
        }
    friend bool friendTorCompare2Dates(const Date & ,
        const Date & );

};

bool friendTorCompare2Dates(const Date & Right,
    const Date & Left) {
    if (Right.month == Left.month && Right.day == Left.day)
        return true;
    else
        return false;
}

#endif
这是主程序:
/*
 * Homework 4  -- UPDATE as needed
 */

#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>

#include "Appointment.h"

using namespace std;

int main() {
    int month, day, year, hour, minute, howLong;
    void callPrint(Time & TimeOrApptObject) {
        TimeOrApptObject.print();
    }
    Appointment myAppointments[19];

    ifstream HW4DataFileHandle;

    HW4DataFileHandle.open("Lab6Data.txt");
    while (!HW4DataFileHandle.eof()) {
        for (int i = 1; i < 20; i++) {
            HW4DataFileHandle >> month;
            HW4DataFileHandle >> day;
            HW4DataFileHandle >> year;
            HW4DataFileHandle >> hour;
            HW4DataFileHandle >> minute;
            HW4DataFileHandle >> howLong;
            myAppointments[i] = Appointment(month, day, year, hour, minute, howLong );
        }
        cout << "enter a month" << endl;
        cin >> month;
        cout << "enter a day" << endl;
        cin >> day;
        cout << "enter a year" << endl;
        cin >> year;
        Date myDate(month, day, year);

        cout << "Appointments for" << month << "/" << day << "/" << year << ":" << endl;

        for (int i = 0; i < 13; i++) {
            if (myAppointments[i] == Date myDate) {
                Time thisTime = myAppointments[i];
                thisDate.print();
                cout << endl;
            }
        }

    }
}
我假设Appointment.h将继承DateTime的公共(public)构造函数,并将它们传递给自己的构造函数Appointment()
我需要更改使其工作吗?请在您的答案中包含一个示例,将不胜感激。如果您有任何疑问或发现其他任何问题,请告诉我。

最佳答案

您认为错误,构造函数未在C++中继承。这就是你需要做的

Appointment::Appointment(int month, int day, int year, int hour, int minute, int howLong) :
     Date(month, day, year), Time(hour, minute), howlong(howlong)
{
}
如果您不熟悉:语法(似乎对每个新手都不熟悉),则需要查找初始化程序列表。
这是您需要修复的其他一些事项。 Date构造函数错误
Date(int, int,int){
  month;
  day;
  year;
}
那应该是
Date(int m, int d, int y) : month(m), day(d), year(y)
{
}
Time构造函数以相同的方式出错
Time(int, int){
    hour;
    minute;
}
那应该是
Time(int h, int m) : hour(h), month(m)
{
}
最重要的是,您似乎在编写未经测试的代码时就犯了经典的新手错误。除非您在测试过程中测试代码,否则您将走向失败。编写几行代码,对其进行测试以确保其正常工作,然后再编写几行代码。
现在的方式是,您将得到100行代码,并带有十几个错误,然后您将完全陷入困境。初学者无法修复带有多个错误的代码,因为无法判断您是否在进步。如果您有十个错误并且已解决了一个错误,那么其余九个错误仍将使您的代码停止工作,因此您将如何知道前进还是后退。
在编写该代码后,应立即捕获在DateTime构造函数中所犯的错误。在进行过程中测试您的代码,我无法强调它的重要性。

09-25 17:24
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