Question

我正在尝试创建一个MovieList类，该类包含动态分配的double []的weeklyRevenue。我一直收到此错误，我知道它与内存分配有关，但不确定具体细节。我怎样才能解决这个问题？

class Movie
{
public:

        Movie();
        void setMovieData(char [],char [],char, int,int,int,int,double[]);
        ~Movie();
        string getTitle() const;
        char getGenre() const;
        void display() const;    
        double getBoxOffice();
        private:
        char title[75];
        char director[50];
        char genre;
        Date releaseDate;
        double* weeklyRevenue;
        double* weeklyTake;
        int numWeeks;
};

class MovieList
{
 public:

        MovieList();    //constuctor

        ~MovieList();   //deconstructor

        int getCapacity();

        int getCurrentSize();

        void addMovie(char[], char[], char, int ,int, int,int, double[]);

        void insertMovie(Movie, int);

        void deleteMovie(char []);

        void displayList() const;

        void displayByGenre(char) const;

        int search(char []) const;

        Movie* movieListObj;

        private:
        int capacity, currentSize;
}

movieList.cpp：

    void Movie::setMovieData(char t[], char dir[], char g, int month, int day, int year,int numWks, double wklyTake[])

    {

    for(int i =0; i < 75; i++)

                title[i] = t[i];

            for (int i = 0; i < 50; i++)

                    director[i] = dir[i];

            genre = g;

            releaseDate.setDate(month,day,year);

            numWeeks = numWks;

            weeklyRevenue = new double[numWeeks];

            wklyTake = new double[numWeeks];

            for (int i = 0; i < numWeeks; i++)

                    weeklyRevenue[i] = wklyTake[i];
    }

    Movie::~Movie()
    {

            delete [] weeklyTake;

            weeklyTake = NULL;

            delete [] weeklyRevenue;

            weeklyRevenue = NULL;
    }
    void Movie::display() const
    {
            cout<<"Title: ";

            for(int i =0; i < 75; i++)

                    cout<< title[i];

            cout << "\nDirector: ";

            for (int i = 0; i < 50; i++)

                    cout << director[i];

        cout << "\nGenre:" << genre<<endl;

        cout << "Release Date: ";

        releaseDate.print();

        cout<<"Weeks since Release: " << numWeeks<<endl;

        cout <<"Box office: " ;

        double BoxOffice = 0;

        for(int i =0; i <numWeeks; i++)

                BoxOffice += weeklyRevenue[i];

        cout << BoxOffice;


}

MovieList::MovieList()
{
        capacity = 5;

        currentSize = 0;

        movieListObj = new Movie[currentSize];

}


MovieList::~MovieList()
{
        delete [] movieListObj;

        movieListObj = NULL;

}
void MovieList::addMovie(char t[], char dir[], char g, int month, int day, int year, int numWeeks, double* weeklyRevenue)
{
        if( currentSize >= capacity)

        {

                capacity += 5;

        }

        movieListObj[currentSize].setMovieData(t, dir, g, month, day, year, numWeeks, weeklyRevenue);

        currentSize++;

}

void MovieList::insertMovie(Movie movieList, int position)
{
        if(position < 0 || position > capacity)

                cout << "insert failed";

        else


        {

                movieListObj[position] = movieList;

                cout << "Insert successful";

        }


}

void MovieList::deleteMovie(char titleDel[])

{
        for( int i= 0; i < currentSize; i++)

        {
                while( titleDel == movieListObj[i].getTitle())

                        cout<< "Delete"  ;


        }
}

我正在尝试添加电影，但是一旦我在addMovie函数中输入所有数据，就会收到错误消息：“抛出'std :: bad_alloc'实例后终止调用 what（）：std :: bad_alloc 中止”

抛出'std :: bad_alloc'what（）：std :: bad_alloc实例后终止调用。动态分配不当？

0 个答案: