videotype.h

这是学习《Data Structures Using C++》

#ifndef H_videoType
#define H_videoType

#include <iostream>
#include <string>
using namespace std;

class videoType 
{     
	friend ostream& operator<<(ostream&, const videoType&);

public:
    void setVideoInfo(string title, string star1, 
                      string star2, string producer, 
                      string director, string productionCo, 
                      int setInStock);
	    //Function to set the details of a video. 
		//Private data members are set according to the parameters.
		//Postcondition: videoTitle = title; movieStar1 = star1;  
		//               movieStar2 = star2; movieProducer = 
		//               producer; movieDirector = director; 
		//               movieProductionCo = productionCo; 
		//               copiesInStock = setInStock

    int getNoOfCopiesInStock() const;
	    //Function to check the number of copies in stock. 
	    //Postcondition: The value of the data member 
 	    //               copiesInStock is returned.     

	void checkOut();
	    //Function to rent a video. 
	    //Postcondition: The number of copies in stock is 
        //               decremented by one.

    void checkIn();
	    //Function to check in a video. 
	    //Postcondition: The number of copies in stock is 
 	    //               incremented by one.     

	void printTitle() const;
	    //Function to print the title of a movie.   

	void printInfo() const;
	    //Function to print the details of a video.
	    //The title of the movie, stars, director, and so on are
	    //displayed on the screen.

     bool checkTitle(string title);
	     //Function to check whether the title is the same as the
		//title of the video.
	    //Postcondition: Returns true if the title is the same as 
 	    //               the title of the video; 
		//                otherwise, returns false.   

	 void updateInStock(int num);
	    //Function to increment the number of copies in stock by 
	    //adding the value of the parameter num.
	    //Postcondition: copiesInStock = copiesInStock  + num     

	 void setCopiesInStock(int num);
	    //Function to set the number of copies in stock.
	    //Postcondition: copiesInStock = num

    string getTitle();
	    //Function to return the title of the video.
 	    //Postcondition: The title of the video is returned.

     videoType(string title = "", string star1 = "", 
              string star2 = "", string producer = "", 
              string director = "", string productionCo = "", 
      	      int setInStock = 0);
	     //constructor
	     //Private data members are set according to the 
 	     //incoming parameters. If no values are specified, the 
 	     //default values are assigned.
		//Postcondition: videoTitle = title; movieStar1 = star1; 
		//               movieStar2 = star2; movieProducer = producer;
		//               movieDirector = director;
		//               movieProductionCo = productionCo;
		//               copiesInStock = setInStock

	    //Overloads the relational operators.
    bool operator==(const videoType&) const;
    bool operator!=(const videoType&) const;

private:
    string videoTitle;		//variable to store the name 
  							//of the movie
    string movieStar1;		//variable to store the name 
 							//of the star
    string movieStar2;		//variable to store the name 
 							//of the star 
    string movieProducer;   //variable to store the name 
  							//of the producer 
    string movieDirector;   //variable to store the name 
                            //of the director 
    string movieProductionCo;  //variable to store the name 
                               //of the production company 
    int copiesInStock; 		//variable to store the number of 
 							//copies in stock
};


#endif