c++ - クラス操作

Question

私はこのプログラムを完了することに少し夢中になっています

以下に示す情報に従って、RockConcert および TicketHolder クラスを実装します。クラス TicketHolder は、特定のコンサートの入場料を支払った人を表します。この TicketHolder クラスは、料金と座席の場所を追跡する必要があります。

提供されたドライバーを考慮して、ほとんどのコードを作成しましたが、メソッド RockConcert::sellTicket および RockConcert::getTicket をコーディングする方法にかなり困惑しています。

以下はコードです、

ありがとうございます！

チケットホルダー.h

#ifndef TicketHolder_h
#define TicketHolder_h
#include <string>
#include <iostream>

using namespace std;

class TicketHolder {

public:
    TicketHolder();
    TicketHolder( std::string seat, double cost );

    std::string getSeat() const;
    double getCost() const;

    friend std::ostream& operator<< (std::ostream& os, const TicketHolder & t);

private:
    std::string my_Seat;
    double my_Cost;
};

#endif

チケットホルダー.cpp

#include "TicketHolder.h"


TicketHolder::TicketHolder(){

}
TicketHolder::TicketHolder( std::string seat, double cost ){
    my_Seat = seat;
    my_Cost = cost;
}

std::string TicketHolder::getSeat() const{
    return (my_Seat);
}

double TicketHolder::getCost() const{
    return (my_Cost);

}

std::ostream& operator<< (std::ostream& os, const TicketHolder & t){
    return os;
}

RockConcert.h

#ifndef RockConcert_h
#define RockConcert_h
#include <string>
#include <iostream>
#include <stdexcept>
#include "TicketHolder.h"
#include "SeatAlreadySold.h"
#include "SeatNotFound.h"

class RockConcert {

public:
    public:
    RockConcert( std::string date, std::string location );

    void sellTicket( std::string seat, double cost ) throw (SeatAlreadySold);
    TicketHolder getTicket( std::string seat ) throw (SeatNotFound);
    double getProceeds( );

    friend std::ostream& operator<< ( std::ostream& out, const RockConcert & r );


private:
        TicketHolder myTickets[ 20 ];
        int myNumberOfTicketsSeenSoFar;
        std::string my_When;
        std::string my_Where;

    };

#endif

RockConcert.cpp

    #include "RockConcert.h"
    #include "TicketHolder.h"

    RockConcert::RockConcert( std::string date, std::string location ) {
        my_When = date;
        my_Where = location;
    }

    void RockConcert::sellTicket( std::string seat, double cost ) throw (SeatAlreadySold){

    }

    TicketHolder RockConcert::getTicket( std::string seat ) throw(SeatNotFound) {


    }

    double RockConcert::getProceeds( ){
        return (myNumberOfTicketsSeenSoFar);

    }

    std::ostream& operator<< ( std::ostream& out, const RockConcert & r ){
        return out;
    }

Driver.CPP

// driver
// function main
#include "TicketHolder.h"
#include "RockConcert.h"
#include <iostream>
#include <stdexcept>

int main(int argc, const char * argv[])

{
RockConcert megaDeath( "Sept 1", "Staples Center" );
megaDeath.sellTicket( "Row Q Seat 20", 120.00 );
megaDeath.sellTicket( "Row Q Seat 21", 120.00 );
megaDeath.sellTicket( "Row SSS Seat 12", 50.00 );
TicketHolder ticket = megaDeath.getTicket( "Row Q Seat 21" );

// Print out the concert and its tickets
std::cout << megaDeath << std::endl;


try {


    megaDeath.sellTicket( "Row T Seat 30", 65.00 );

} catch( SeatAlreadySold sas ) {

    std::cout << "An error occurred here for the reason:";
    std::cout << sas.what(std::endl:endl;
}

// Print out the library and its book - notice the difference
std::cout << megaDeath << std::endl;
// Let's try to throw some errors...
try {
    // can't sell a ticket that has already been sold
    megaDeath.sellTicket( "Row Q Seat 21", 120.00 );
    std::cout << "An error occurred here..." ;
} catch( SeatAlreadySold sas ) {
    sas.what();
}

try {
    // can't get a ticket that has not been sold
    megaDeath.getTicket( "Row A Seat 1" );
    std::cout << "An error occurred here..." ;
} catch( SeatNotFound snf ) {
    snf.what();
}

}