十七周任务一

/* (程序头部注释开始)
* 程序的版权和版本声明部分
* Copyright (c) 2011, 烟台大学计算机学院学生
* All rights reserved.
* 文件名称：
* 作    者：张艳明
* 完成日期：2012   年   06   月   13   日
* 版 本 号： V1.0
* 对任务及求解方法的描述部分
* 输入描述：
* 问题描述：
* 程序输出：
* 程序头部的注释结束
*/

#include<iostream>
#include<fstream>
#include<string>
#include<iomanip>
using namespace std;
class Student
{
public:
Student();
Student(string name,int C_plus_plus,int Math,int English,int All_score,double Average);
void set_name(string name);
void set_C_plus_plus(int C_plus_plus);
void set_Math(int Math);
void set_English(int English);
void set_All_score(int All_score);
void set_Average(double Average);
string get_name();
int get_C_plus_plus();
int get_Math();
int get_English();
int get_All_score();
double get_Average();
friend void high_C_plus_plus_score(Student  s[]);
friend void high_Math_score(Student  s[]) ;
friend void high_English_score(Student  s[]);
friend void high_All_score(Student  s[]);
friend void Descending_order(Student  s[]);//排序，降序；
friend void All_score(Student  s[]);
friend void Average_score(Student  s[]);
friend ostream& operator << (ostream&,Student&); //重载流插入运算符“<<”  ;
friend void insert_data(Student  s[]);
friend void check_data();
private:
string name;
int C_plus_plus;
int Math;
int English;
int All_score;
double Average;
};
void input_student(Student  s[]);
void ordered_student_dat(Student s[]);
int main()
{
Student s1[101],s2,s3[1];
input_student(s1);//读入100人的原始分数
//ordered_student_dat(s1);
insert_data(s1);
All_score(s1);
Average_score(s1);
cout<<"C++的最高分为：";
high_C_plus_plus_score(s1);
cout<<endl;
cout<<"高数的最高分为：";
high_Math_score(s1);
cout<<endl;
cout<<"英语的最高分为：";
high_English_score(s1);
cout<<endl;
cout<<"总分的最高分为：";
high_All_score(s1);
cout<<endl;
Descending_order(s1);
ordered_student_dat(s1);
check_data();
cout<<endl;
system("PAUSE");
return 0;
}
Student::Student()
{
name="unknow";
C_plus_plus=0;
Math=0;
English=0;
All_score=0;
Average=0.0;
}
Student::Student(string name,int C_plus_plus,int Math,int English,int All_score,double Average)
{
this->name=name;
this->C_plus_plus=C_plus_plus;
this->Math=Math;
this->English=English;
this->All_score=All_score;  //this指针
this->Average=Average;
}

void input_student(Student s[])
{
int i=0;
string name;
int C_plus_plus;
int Math;
int English;
ifstream infile("score.dat",ios::in);
if (!infile)
{
cerr<<"open error!"<<endl;
exit(1);
}
for (i=0;i<101;i++)
{
infile>>name;
s[i].set_name(name);
infile>>C_plus_plus;
s[i].set_C_plus_plus(C_plus_plus);
infile>>Math;
s[i].set_Math(Math);
infile>>English;
s[i].set_English(English);
}
infile.close();

}
void ordered_student_dat(Student s[])
{
ofstream outfile("binary_score.dat",ios::out);
if(!outfile)
{
cerr<<"open error!"<<endl;
exit(1);
}

for(int i=0;i<101;i++)
outfile<<'\t'<<"\t"<<"\t"<<"\t"<<s[i].get_name()<<'\t'<<'\t'<<"\t"<<s[i].get_C_plus_plus()<<"\t"<<s[i].get_Math()<<"\t"<<s[i].get_English()<<"\t"<<s[i].get_All_score()<<"\t"<<setiosflags(ios::fixed)<<setprecision(2)<<s[i].get_Average()<<'\n';
outfile.close();
return ;
}

void Student::set_name(string name)
{
this->name=name;
}
void Student::set_C_plus_plus(int C_plus_plus)
{
this->C_plus_plus=C_plus_plus;
}
void Student::set_Math(int Math)
{
this->Math=Math;
}
void Student::set_English(int English)
{
this->English=English;
}
void Student::set_All_score(int All_score)
{
this->All_score=All_score;
}
void Student::set_Average(double Average)
{
this->Average=Average;
}
string Student::get_name()
{
return name;
}
int Student::get_C_plus_plus()
{
return C_plus_plus;
}
int Student::get_Math()
{
return Math;
}
int Student::get_English()
{
return English;
}
int Student::get_All_score()
{
return All_score;
}
double Student::get_Average()
{
return Average;
}

void high_C_plus_plus_score(Student  s[])
{
Student student;
int score;
int i=0,j=0;
string name;
score=s[i].get_C_plus_plus();
student.set_C_plus_plus(score);
for(i=0;i<100;++i)
{
if(student.get_C_plus_plus()<s[i+1].get_C_plus_plus())
{
score=s[i+1].get_C_plus_plus();
student.set_C_plus_plus(score);
name=s[i+1].get_name();
student.set_name(name);
}
}
cout<<student.get_C_plus_plus()<<'\n';
cout<<endl;
cout<<"获得C++最高分的这几名同学叫：";
for(i=0;i<101;++i)
{
if(student.get_C_plus_plus()==s[i].get_C_plus_plus())
cout<<s[i].get_name()<<'\t';
}
cout<<'\n';
return ;
}
void high_Math_score(Student  s[])
{
Student student;
int score,i=0;
string name;
score=s[i].get_Math();
student.set_Math(score);
for(i=0;i<100;++i)
{
if(student.get_Math()<s[i+1].get_Math())
{
score=s[i+1].get_Math();
student.set_Math(score);
name=s[i+1].get_name();
student.set_name(name);
}
}
cout<<student.get_Math()<<'\n';
cout<<endl;
cout<<"获得高数最高分的这几名同学叫：";
for(i=0;i<101;++i)
{
if(student.get_Math()==s[i].get_Math())
cout<<s[i].get_name()<<'\t';
}
cout<<'\n';
return ;
}

void high_English_score(Student  s[])
{
Student student;
int score,i=0;
string name;
score=s[i+1].get_English();
student.set_English(score);
for(i=0;i<100;++i)
{
if(student.get_English()<s[i+1].get_English())
{
score=s[i+1].get_English();
student.set_English(score);
name=s[i+1].get_name();
student.set_name(name);
}
}
cout<<student.get_English()<<'\n';
cout<<endl;
cout<<"获得英语最高分的这几名同学叫：";
for(i=0;i<101;++i)
{
if(student.get_English()==s[i].get_English())
cout<<s[i].get_name()<<'\t';
}
cout<<'\n';
return ;
}
void high_All_score(Student  s[])
{
Student student;
int score,i=0;
string name;
score=s[i].get_All_score();
student.set_All_score(score);
for(i=0;i<100;++i)
{
if(student.get_All_score()<s[i+1].get_All_score())
{
score=s[i+1].get_All_score();
student.set_All_score(score);
name=s[i+1].get_name();
student.set_name(name);
}
}
cout<<student.get_All_score()<<'\n';
cout<<endl;
cout<<"获得总分最高分的这几名同学叫：";
for(i=0;i<101;++i)
{
if(student.get_All_score()==s[i].get_All_score())
cout<<s[i].get_name()<<'\t';
}
cout<<'\n';
return ;
}
void Descending_order(Student  s[])
{
Student student;
string name;
int i,j;
for(i=0;i<101-1;i++)
{
for(j=0;j<101-i-1;j++)
{
if(s[j].get_All_score()<s[j+1].get_All_score())
{
student=s[j+1];
s[j+1]=s[j];
s[j]=student;
}
}
}

}
void All_score(Student  s[])
{
int score;
for(int i=0;i<101;++i)
{
score=s[i].get_C_plus_plus()+s[i].get_Math()+s[i].get_English();
s[i].set_All_score(score);
}

}
void Average_score(Student  s[])
{
double average;
for(int i=0;i<101;++i)
{
average=double(s[i].get_C_plus_plus()+s[i].get_Math()+s[i].get_English())/3;
s[i].set_Average(average);
}
}

ostream& operator << (ostream&output,Student&s)
{
if(s.get_C_plus_plus()!=0)
{
output<<s.get_C_plus_plus()<<'\t'<<"该同学名叫："<<s.get_name()<<endl;
}
else if(s.get_Math()!=0)
{
output<<s.get_Math()<<'\t'<<"该同学名叫："<<s.get_name()<<endl;
}
else if(s.get_English()!=0)
{
output<<s.get_English()<<'\t'<<"该同学名叫："<<s.get_name()<<endl;
}
else
{
output<<s.get_All_score()<<'\t'<<"该同学名叫："<<s.get_name()<<endl;
}
return output;
}
void insert_data(Student  s[])
{
string name;
int C_plus_plus;
int Math;
int English;
cout<<"请输入您的姓名，C++成绩，高数成绩和英语成绩，中间以空格顿开："<<'\n';
cin>>name>>C_plus_plus>>Math>>English;
s[100].set_name(name);
s[100].set_C_plus_plus(C_plus_plus);
s[100].set_Math(Math);
s[100].set_English(English);
cout<<endl;
/*-ifstream outfile("binary_score.dat",ios::in|ios::binary);//|ios::binary
if(!outfile)
{
cerr<<"open error!"<<endl;
abort( );
}
outfile<<s[100].get_name()<<s[100].get_C_plus_plus()<<s[100].get_Math()<<s[100].get_English();
outfile.close();*/
}
void check_data()
{
Student s[107];
int i=0;
string name,str[6];
int C_plus_plus;
int Math;
int English;
int All_score;
double Average;
ifstream infile("binary_score.dat",ios::in);
if (!infile)
{
cerr<<"open error!"<<endl;
exit(1);
}
/*  for (i=0;i<6;i++)
{
infile>>str[i];
}*/
for (i=0;i<107;i++)
{
infile>>name;
s[i].set_name(name);
infile>>C_plus_plus;
s[i].set_C_plus_plus(C_plus_plus);
infile>>Math;
s[i].set_Math(Math);
infile>>English;
s[i].set_English(English);
infile>>All_score;
s[i].set_All_score(All_score);
infile>>Average;
s[i].set_Average(Average);
}
infile.close();
/*  for (i=0;i<6;i++)
{
cout<<str[i];
}*/
cout<<s[0].get_name()<<"\t"<<s[0].get_C_plus_plus()<<"\t"<<s[0].get_Math()<<"\t"<<s[0].get_English()<<"\t"<<s[0].get_All_score()<<"\t"<<setiosflags(ios::fixed)<<setprecision(2)<<s[0].get_Average()<<'\n';
for(i=1;i<101;i++)
cout<<s[i].get_name()<<'\t'<<"\t"<<s[i].get_C_plus_plus()<<"\t"<<s[i].get_Math()<<"\t"<<s[i].get_English()<<"\t"<<s[i].get_All_score()<<"\t"<<setiosflags(ios::fixed)<<setprecision(2)<<s[i].get_Average()<<'\n';

}