第十六周实验报告2

作品名：学生成绩

#include <iostream>
#include <fstream>
#include <string>
#include <iomanip>
using namespace std;
class Student
{
private:
	string name;
	float Cscore;
	float Mscore;
	float Escore;
	float Tscore; 
	float Ascore;
public:
	Student( float c, float m, float e, float t, float a, string nam);
	Student();
	void setname(string na){name = na;}
	void setCscore(float c){Cscore = c;}
	void setMscore(float m){Mscore = m;}
	void setEscore(float e){Escore = e;}
	void setTscore(float t){Tscore = t;}
	void setAscore(float a){Ascore = a;}
	string getname(){return name;}
	float getCscore(){return Cscore;}
	float getMscore(){return Mscore;}
	float getEscore(){return Escore;}
	float getTscore(){return Tscore;}
	float getAscore(){return Ascore;}
	friend void readfile(Student s[]);
	friend void Cmaxscore(Student s[]);
	friend void Mmaxscore(Student s[]);
	friend void Emaxscore(Student s[]);
	friend void Tmaxscore(Student s[]);
	friend void array_score(Student s[]);
	//friend void show_max(Student s[]);
	friend void writefile(Student s[]);
};
Student::Student()
{
	name = " ";
	Cscore = 0;
	Mscore = 0;
	Escore = 0;
	Tscore = 0;
	Ascore = 0;
}
Student::Student( float c, float m, float e, float t, float a, string nam)
{
	name = nam;
    Cscore = c;
    Mscore = m;
	Escore = e;    
	Tscore = t;    
	Ascore = a;    
}	

void readfile(Student s[])  //读文件
{
	string na;
	float cscore;
	float mscore;
	float escore;
	float tscore;
	float ascore;
	ifstream readfile("score.dat", ios::in);
	if(! readfile)
	{
		cerr << "open errror" << endl;
		exit(1);
	}
	for(int i = 0; i < 100; i++)
	{
		readfile >> na >> cscore >> mscore >> escore;

		s[i].setname(na) ;
		s[i].setCscore(cscore);
		s[i].setMscore(mscore);
		s[i].setEscore(escore);

		tscore = s[i].Cscore + s[i].Escore + s[i].Escore ;
		s[i].setTscore(tscore);
		ascore = s[i].Tscore / 3;
		s[i].setAscore(ascore);
	}
	readfile.close();
}
void Cmaxscore(Student s[])  //C++的最高分
{
	Student t = s[0];
	float max = s[0].Cscore;
	for(int i = 1; i < 100; i++)
	{
		if(max < s[i].Cscore)
		{
			max = s[i].Cscore;
			t = s[i];
		}
	}
	cout << "C++成绩最高的是：" << max << setw(18) << "该同学是：" << t.name <<endl;
}

void Mmaxscore(Student s[])  //高数的最高分
{
	Student t = s[0];
	float max = s[0].Mscore;
	for(int i = 1; i < 100; i++)
	{
		if(max < s[i].Mscore)
		{
			max = s[i].Mscore;
			t = s[i];
		}
	}
	cout << "高数成绩最高的是：" << max << setw(17) << "该同学是：" << t.name << endl;
}

void Emaxscore(Student s[])  //英语的最高分
{
	Student t = s[0];
	float max = s[0].Escore;
	for(int i = 1; i < 100; i++)
	{
		if(max < s[i].Escore)
		{
			max = s[i].Escore;
			t = s[i];
		}
	}
	cout << "英语成绩最高的是：" << max  << setw(17) << "该同学是：" << t.name <<endl;
}
void Tmaxscore(Student s[])  //总成绩的最高分
{
	Student t = s[0];
	float max = s[0].Tscore;
	for(int i = 1; i < 100; i++)
	{
		if(max < s[i].Tscore)
		{
			max = s[i].Tscore;
			t = s[i];
		}
	}
	cout << "总成绩最高的是：" << max << setw(19) << "该同学是：" << t.name << endl;
}
void array_score(Student s[])  //排序
{
	Student t;
	for(int i = 0; i < 100; i++)
	{
		for(int j = 0; j < 100 - i; j++)
			if(s[j].Tscore < s[j + 1].Tscore)
			{
				t = s[j];
				s[j] = s[j + 1];
				s[j +1] = t;
			}
	}
}
	//void show_max(Student s[]);
void writefile(Student s[])  
{
	
	ofstream writefile("odered_score.dat", ios::out);
	if(! writefile)
	{
		cerr << "open errror" << endl;
		exit(1);
	}
    writefile << "名字" <<setw(8)<< "C++" <<setw(8)<< "高数" << setw(8) << "英语" << setw(8) << "总成绩" << setw(14) << "平均成绩" << endl;
	for(int i = 0; i < 100; i++)
	{
		writefile  << s[i].getname() << setw(8) << s[i].getCscore() << setw(8) << s[i].getMscore() << setw(8) << s[i].getEscore() << setw(8) << s[i].getTscore() << setw(14) << s[i].getAscore() << endl;
	}
	writefile.close();

}
int main()
{
	Student stu[100];
	readfile(stu);
	Cmaxscore(stu);
	Mmaxscore(stu);
	Emaxscore(stu);
	Tmaxscore(stu);
	array_score(stu);
	writefile(stu);

	system("pause");
	return 0;
}

再用冒泡法排序时， 不能改变，原来的属性