16.2

#include<fstream>
#include <iostream>
#include<string>
using namespace std;
class Student
{
public:
Student(){};
Student( string nam ,double c,double m,double e):cpp(c),name(nam),english(e){total=c+m+e;}
void set_value(string nam, double c, double m, double e);  
    string get_name(){return name;}  
    double get_cpp(){return cpp;}  
    double get_math(){return math;}  
    double get_english(){return english;}  
    double get_total(){return total;}  
    void set_cpp(double c){cpp=c;}  
    void set_math(double m){math=m;}  
    void set_english(double e){english=e;}  
    void set_total(double t){total=t;}  


private:
string name;
double cpp;
double math;
double english;
double total;
//double Jf;
};
void Student::set_value(string nam, double c, double m, double e)  
{  
    name=nam;  
    cpp=c;  
    math=m;  
    english=e;  
    total=c+m+e;  
}  
int main( )  
{  
    Student stud[100],t; //stud[100]为保存数据的对象数组   
    string sname;  
    double scpp, smath, senglish;  
    int i,j;  
  
    //将文件中的数据读入到对象数组中   
    ifstream infile("score.dat",ios::in);  //以输入的方式打开文件   
    if(!infile)       //测试是否成功打开   
    {  
        cerr<<"open error!"<<endl;  
        exit(1);  
    }  
    for(i=0;i<100;i++)  
    {  
        infile>>sname>>scpp>>smath>>senglish;  
        stud[i].set_value(sname, scpp, smath, senglish);  
    }  
    infile.close();  
  
    //求各科最高分及总分最高分   
    Student max_stud("nobody",0,0,0);  //max_stud是一个不存在的学生，存储最高分   
    for(i=0;i<100;i++)  
    {  
        if(stud[i].get_cpp()>max_stud.get_cpp()) max_stud.set_cpp(stud[i].get_cpp()); 
        if(stud[i].get_math()>max_stud.get_math()) max_stud.set_math(stud[i].get_math()); 
        if(stud[i].get_english()>max_stud.get_english()) max_stud.set_english(stud[i].get_english()); 
        if(stud[i].get_total()>max_stud.get_total()) max_stud.set_total(stud[i].get_total()); 
    }  
  
    //按总分排序   
    for(j=0;j<100-2;j++)   
    {  
        for(i=0;i<100-j-1;i++)     
            if (stud[i].get_total()<stud[i+1].get_total())   
            {  
                t=stud[i];   
                stud[i]=stud[i+1];  
                stud[i+1]=t;  
            }  
    }  
  
    //显示各科及总分的最高分   
    cout<<"C++最高分为: "<<max_stud.get_cpp()<<endl;  
    cout<<"高等数学最高分为: "<<max_stud.get_math()<<endl;  
    cout<<"英语最高分为: "<<max_stud.get_english()<<endl;  
    cout<<"总分最高分为: "<<max_stud.get_total()<<endl;  
  
    //将按总分排序后的结果存入文件   
    cout<<"请到文件ordered_salary.txt中查看排序后的结果"<<endl;  
    ofstream outfile("ordered_salary.txt",ios::out);   
    if(!outfile)      
    {  
        cerr<<"open error!"<<endl;  
        exit(1);  
    }  
    for(i=0;i<100;i++)  
    {  
        outfile<<stud[i].get_name()<<"\t";  
        outfile<<stud[i].get_cpp()<<"\t";  
        outfile<<stud[i].get_math()<<"\t";  
        outfile<<stud[i].get_english()<<"\t";  
        outfile<<stud[i].get_total()<<endl;  
    }  
    outfile.close();      
    system("pause");  
    return 0;  
}