在没有活动异常的情况下调用被称为终止的纯虚函数的方法

时间:2019-12-11 08:19:31

标签: c++ abstract-class

嗨,我正在执行按数字查找运输工具的功能,但遇到错误,我不知道为什么。

我必须抽象基类“ Transport”。

class Transport
{
protected:
    int transportNumber;
    char transportName[20];
    char company[20];
    struct tm dateOfMaking;
    double speed;
    char propertyType[20];
    char transportType[20];

public:
    Transport();
    Transport(int,char*, char*, struct tm, double, char*, char*);
    ~Transport();

    virtual char* GetName() = 0;
    virtual bool Warning(double);
    virtual void Print() = 0;
    virtual void Save() = 0;
    virtual int GetPassengerNumber();
    virtual double GetEmptyWeight();
    char * GetTransportType() { return transportType; }
    int GetTransportNumber() { return transportNumber;}
};

此类从Transport继承。

class Aerial : public Transport
{
protected:
    int engineNumber;
    double length;
public:
    Aerial() {}
    Aerial(int, char*, char*, struct tm, double, char*, char*, int, double);
    ~Aerial();
};

我有一个此类,它是从Aeron类继承的。

class PassengerPlane : public Aerial
{
private:
    int seatNumber;
    double Bagswieght;
public:
    PassengerPlane() {}
    PassengerPlane(int, char*, char*, struct tm, double, char*, char*, int, double, int,double);
    ~PassengerPlane();
    char* GetName();
    bool Warning(double);
    int GetPassengerNumber() { return seatNumber; }
    void Save();
    void Print();
};

使用ProgrammeManagement :: TransporSearchByNumber(int TN)函数返回Transport *值,您已经在此函数中存储并搜索文件中的对象,如下所示:

Transport* ProgrammeManagement::TransporSearchByNumber(int TN)
{
    char num;
    int x = 1;
    PassengerPlane e;
    Transport *T;
    fstream file(Type,ios::in);
    fstream fil(TransportFilePath,ios::in);
    while(file.get(num))
    {
        if( num == '1')
        {

            fil.read((char*)&e,sizeof(PassengerPlane));
            T = &e;
            if( TN == T->GetTransportNumber()){
            x = 0;
            return T;
            }
        }
    }

    if(x){
        cout << "Not found";
    }
    file.close();
    fil.close();
}

我主要执行以下操作:

Transport*s;
  s = ProgrammeManagement::TransporSearchByNumber(2);
  s->Print();

但是当我在Transport上调用Print()函数时,出现以下错误(在运行时,它会编译):

pure virtual method called
terminate called without an active exception

任何帮助如何解决此问题的人。

非常感谢您!

0 个答案:

没有答案
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