第十六周实验报告（任务二）【学生成绩】

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/* (程序头部注释开始)

* 程序的版权和版本声明部分

* 文件名称：学生成绩

* 作者：张培培

* 完成日期： 2012年 06月 05日

* 版本号：

* 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 <iomanip>   #include <string>   #include <fstream>   #include <iostream>   using namespace std;    class Student  {  private:      string name;        double score_cpp;        double score_math;        double score_English;        double score_all;        double score_average;   public:      double all_score();        double ave_score();       void Score();      void write_score(ifstream &in);      void read_score(ofstream &out)  ;  };    double Student::all_score()    {        this->score_all = this->score_cpp + this->score_math + this->score_English;        return this->score_all;    }        double Student::ave_score()    {        this->score_average = (this->score_cpp + this->score_math + this->score_English) / 3;        return this->score_average;    }    void Student::Score()  {      cout << setw(6) << setiosflags(ios::left) << this -> name << " "             << this ->score_cpp << '\t' << this ->score_math << '\t' << this ->score_English << '\t'           << this ->score_all << '\t' << this ->score_average << '\t';                cout<<endl;  }  void Student::write_score(ifstream &in)    {        in >> this->name >> this->score_cpp >> this->score_math >> this->score_English;    }    void Student::read_score(ofstream &out)    {        out << this->name << '\t' << this->score_cpp << '\t' << this->score_math << '\t' << this->score_English << endl;    }      void output_score(Student * s, int num)    {        ifstream infile("score.dat",ios::in);            if(!infile)        {            cerr << "open error!" << endl;            exit(1);        }            for(int i = 0; i < 100; ++i)        {            s[i].write_score(infile);        }        infile.close();    }    void bubble_score(Student * s, int num)    {        Student t;        for(int j = 0; j < num-1; j++)        {            for(int i = 0; i < num-1-j; ++i)            {                if(s[i].all_score() <= s[i+1].all_score())                {                    t = s[i];                    s[i] = s[i+1];                    s[i+1] = t;                }            }        }        }    void readfile(Student * s, int num)    {        ofstream outfile("odered_score.dat",ios::out);            if(!outfile)        {            cerr << "open error!" << endl;            exit(1);        }            for(int i = 0; i < 100; ++i)        {            s[i].read_score(outfile);            s[i].all_score();          s[i].ave_score();          s[i].Score();      }        outfile.close();    }        int main()    {        Student stu[100];           output_score(stu, 100);        bubble_score(stu, 100);        readfile(stu, 100);            system("pause");        return 0;    }    #include <iomanip>#include <string>#include <fstream>#include <iostream>using namespace std;class Student{private:string name;      double score_cpp;      double score_math;      double score_English;      double score_all;      double score_average; public:double all_score();      double ave_score(); void Score();void write_score(ifstream &in);void read_score(ofstream &out)  ;};double Student::all_score()  {      this->score_all = this->score_cpp + this->score_math + this->score_English;      return this->score_all;  }    double Student::ave_score()  {      this->score_average = (this->score_cpp + this->score_math + this->score_English) / 3;      return this->score_average;  }  void Student::Score(){    cout << setw(6) << setiosflags(ios::left) << this -> name << " "           << this ->score_cpp << '\t' << this ->score_math << '\t' << this ->score_English << '\t' << this ->score_all << '\t' << this ->score_average << '\t';              cout<<endl;}void Student::write_score(ifstream &in)  {      in >> this->name >> this->score_cpp >> this->score_math >> this->score_English;  }  void Student::read_score(ofstream &out)  {      out << this->name << '\t' << this->score_cpp << '\t' << this->score_math << '\t' << this->score_English << endl;  }  void output_score(Student * s, int num)  {      ifstream infile("score.dat",ios::in);        if(!infile)      {          cerr << "open error!" << endl;          exit(1);      }        for(int i = 0; i < 100; ++i)      {          s[i].write_score(infile);      }      infile.close();  }  void bubble_score(Student * s, int num)  {      Student t;      for(int j = 0; j < num-1; j++)      {          for(int i = 0; i < num-1-j; ++i)          {              if(s[i].all_score() <= s[i+1].all_score())              {                  t = s[i];                  s[i] = s[i+1];                  s[i+1] = t;              }          }      }    }  void readfile(Student * s, int num)  {      ofstream outfile("odered_score.dat",ios::out);        if(!outfile)      {          cerr << "open error!" << endl;          exit(1);      }        for(int i = 0; i < 100; ++i)      {          s[i].read_score(outfile);          s[i].all_score();s[i].ave_score();s[i].Score();    }      outfile.close();  }    int main()  {      Student stu[100];       output_score(stu, 100);      bubble_score(stu, 100);      readfile(stu, 100);        system("pause");      return 0;  }

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