d_7_1.cpp

C++应用教程原码,里面包含该书中有十三章内容的代码,详细具体

#include "stdafx.h"
#include <iostream>
#include <string>
#include<iomanip>
using namespace std;

const int Max = 20;

class Lesson {
private:
	float chinese, math, english;
public:
	float sum;
	Lesson()
	{}
	Lesson(float c, float m, float e)
		: chinese(c), math(m), english(e)
	{ sum = c + m + e;}
	float dispChinese()
	{ return chinese; }
	float dispMath()
	{ return math; }
	float dispEnglish()
	{ return english; }
};

class Person {
private:
	string name;
public:
	Person()
	{}
	Person(string n)
		:name(n)
	{}
	string dispName()
	{ return name; }
};

class Student:public Person,public Lesson {
private:
	int rank;
public:
	friend void sort(int index);
	Student ()
	{}
	Student(string n,float c, float m, float e)
		:Person(n),Lesson(c,m,e)
	{}
};

void sort(int index,Student *s)  //直接选择排序
	{
	    int i,j;
		float pick;
		Student temp;
    	for(i=0;i<index;i++)
		{   pick = s[i].sum;
		    for( j=i+1;j< index;j++)
			{ 	if( pick > s[j].sum)
			    {	temp = s[i];
			        s[i] = s[j];
					s[j] = temp;
				}
			}
		}
	}


void main()
{   int i;
    string n[4];
	float c[4], m[4], e[4];
	for (i=0;i<4;++i)
	{ cout << "请输入姓名:";
	  cin >> n[i];
	  cout << "请输入语文、数学和英语的成绩:";
	  cin >> c[i] >> m[i] >> e[i];
	}
	Student A[4] = {
		Student (n[0],c[0],m[0],e[0]),
		Student (n[1],c[1],m[1],e[1]),
		Student (n[2],c[2],m[2],e[2]),
		Student (n[3],c[3],m[3],e[3])

	};
    sort(4,A);
    cout <<endl;
	cout << "姓名"<<setw(10)<< "语文" <<setw(10)<< "数学" <<setw(10)<< "英语" 
		 <<setw(10)<< "总分" << endl;
	for (i=3;i>=0;--i)
		cout << A[i].dispName() <<setw(10)<< A[i].dispChinese() 
		     <<setw(10)<< A[i].dispMath() <<setw(10)<< A[i].dispEnglish() 
			 <<setw(10)<< A[i].sum
			 << endl;
	 cin.get(); cin.get(); //等待结束，以便调测程序，可以删除
}