pex3_14.cpp

数据结构C++代码,经典代码,受益多多,希望大家多多支持

#include <iostream.h>
#include <iomanip.h>

class Baseball
{
 	private: 
		// data members
    	int     playerno;
    	int     atbats;
    	int     hits;
    	float   batave;
    	
    	// private method. compute batting average
		float   ComputeBatAve (void)
		{
			// if no player number or player has no at bats, return 0
			if (playerno == -1 || atbats == 0)
				return 0;
			else
				// return batting average
				return float(hits)/atbats;
		}
		
	public:
		// constructor with default parameters
		Baseball(int n = -1, int ab = 0, int h = 0);
		
		// data access operations
		void ReadPlayer(void);
		void WritePlayer(void) const;
		float GetBatAve(void) const;
};

// constructor. assign data members
Baseball::Baseball(int n, int ab, int h):
		playerno(n), atbats(ab), hits(h)
{
	// call ComputeBatAve to assign batting average
	batave = ComputeBatAve();
}

// read player information
void Baseball::ReadPlayer(void)
{
	// if object not initialized, read player number
	if (playerno == -1)
	{
		cout << "Player number: ";
		cin >> playerno;
	}
	
	// read at bats, hits and compute batting average
	cout << "Player " << playerno << " at bats: ";
	cin >> atbats;
	cout << "Hits: ";
	cin >> hits;
    batave = ComputeBatAve();
}

// print player number and batting average
void Baseball::WritePlayer (void) const
{
	// set fill character to '0'
	cout.fill('0');
	// print the data
    cout << "Player:  "  << playerno << "    Average: "
    	 << setw(3) << int(batave*1000)<< endl;
    // reassign fill character to blank
    cout.fill(' ');
}

// return the batting average
float Baseball::GetBatAve(void) const
{
	return batave;
}

void main(void)
{
	// define four Baseball objects
	Baseball Catcher(10,100,30), Shortstop(44), Centerfielder, Maxobject;

	// read information for Shortstop and Centerfielder.
	Shortstop.ReadPlayer();
	Centerfielder.ReadPlayer();
	cout << endl;

	// print information for all players
	Catcher.WritePlayer();  
	Shortstop.WritePlayer();  
	Centerfielder.WritePlayer();
	cout << endl;
	
	// assign Maxobject the value Catcher. then compare the batting
	// average stored in Maxobject with those of the other two objects,
	// reassigning Maxobject if a larger average is found. Maxobject will
	// contain the player with the highest batting average
	Maxobject = Catcher;
	if (Shortstop.GetBatAve() > Maxobject.GetBatAve())
		Maxobject = Shortstop;
	if (Centerfielder.GetBatAve() > Maxobject.GetBatAve())
		Maxobject = Centerfielder;

	cout << "Player with the highest average: ";
	Maxobject.WritePlayer();

}

/*
<Run>

Player 44 at bats: 2000
Hits: 185
Player number: 25
Player 25 at bats: 3200
Hits: 1000

Player:  10    Average: 300
Player:  44    Average: 092
Player:  25    Average: 312

Player with the highest average: Player:  25    Average: 312
*/