未在此范围中声明的数据“成员” [英] Data "member not declared in this scope"

问题描述

我想创建一个向量来存储对象。我已经添加到类的头文件作为私有数据成员。

I'm trying to create a vector which will store objects. I have added to the header file of the class as a private data member.

我试图将此向量初始化为空（以便我可以在程序中添加对象），但是当我编译这个程序进行测试时，返回错误：

I am trying to initialize this vector as being empty (so that I can add objects to it later on in the program) but when I compile this program to test, this error is returned:

...错误：'_bookingVector'未在此范围内声明|

...error: '_bookingVector' was not declared in this scope|

我认为问题是我的默认构造函数的初始化列表（_bookingVector显然是向量）：

I think the problem is with my initialization list on my default constructor(_bookingVector is obviously the vector):

Schedule::Schedule() : _bookingVector()
{ }

$ b b

我的语法错误吗？

Is my syntax wrong? Or are vectors initialized differently?

这是我的代码：

Schedule.h

Schedule.h

#ifndef SCHEDULE_H
#define SCHEDULE_H
#include "Booking.h"
#include <vector>    
using namespace std;


class Schedule
{    
    public:
        Schedule();
        void AddBooking(int bday, int btime, int btrainer, int bid);
        void RemoveBooking(int bday, int btime);
        void DisplaySchedule();
        void DisplayAvailableTimeSlots();    
        //For Testing
        void DisplayDebug();

    private:
        vector<Booking> _bookingVector;   

};    
#endif // SCHEDULE_H

Schedule.cpp

Schedule.cpp

#include "Schedule.h"
#include "Booking.h"
#include <vector>
#include <iostream> 

Schedule::Schedule() : _bookingVector()
{ }    

void AddBooking(int bday, int btime, int btrainer, int bid){    
    Booking bookingObject(bday, btime, btrainer, bid);
    _bookingVector.push_back(bookingObject);    

}


void DisplayDebug(){

    for(int i = 0; i < _bookingVector.size(); ++i){    
        cout << _bookingVecotr[i] << endl;    
    }    
}

我非常渴望了解做错了，修复它。

I'm very eager to learn what I'm doing wrong and fix it.

推荐答案

问题不在于构造函数，如果不必要 ¹ ，看起来很好。问题是你已经定义 AddBooking 和 DisplayDebug 作为非成员函数，但这些应该是成员为了访问该类的其他成员。

The issue is not with the constructor, which looks fine if unnecessary¹. The issue is that you have defined AddBooking and DisplayDebug as non-member functions, but these should be members in order to access other members of the class.

将定义修改为 Schedule 类的范围，因此： / p>

Modify the definitions to be in the scope of the Schedule class thus:

void Schedule::AddBooking(int bday, int btime, int btrainer, int bid) { ...
     ^^^^^^^^^^

void Schedule::DisplayDebug(){ ...
     ^^^^^^^^^^

此外，不要在头文件中使用命名空间std d进一步说，不要在任何地方说，但没有普遍的协议。）

Also, don't say using namespace std in a header file (I'd go further and say don't say it anywhere but there isn't universal agreement on that.)

^{1您的默认构造函数不会执行编译器生成的不会做的任何事情。您可以安全地删除它。}

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