项目-用二进制文件处理学生成绩

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【项目-用二进制文件处理学生成绩】 
(1)定义学生类,其中包含学号、姓名、C++课、高数和英语成绩及总分数据成员,成员函数根据需要确定。 
(2)读入学生的成绩,并求出总分,用对象数组进行存储。ASCII文件score.dat中保存的是100名学生的学号、姓名和C++课、高数和英语成绩。 
(3)将所有数据保存到一个二进制文件binary_score.dat中,最后通过键盘输入你的信息,并写入到文件中(咱不谦虚,三科全100分,期末求好运)。 
(4)为验证输出文件正确,再将binary_score.dat中的记录逐一读出到学生对象中并输出查看。 

(5)用BinaryViewer命令查看二进制文件文件


    #include <fstream>      #include<iostream>      #include<cstring>      #include<cstdlib>      using namespace std;            class Student      {      public:          Student(){};          Student(int n, string nam, double c, double m, double e):num(n),name(nam),cpp(c),math(m),english(e){total=c+m+e;}          void set_value(int n,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;}          friend  ostream& operator<<(ostream&, Student&);      private:          int num;          string name;          double cpp;          double math;          double english;          double total;      };            void Student::set_value(int n,string nam, double c, double m, double e)      {          num=n;          name=nam;          cpp=c;          math=m;          english=e;          total=c+m+e;      }            ostream& operator<<(ostream& out, Student& s)      {          out<<s.num<<" "<<s.name<<" "<<s.cpp<<" "<<s.math<<" "<<s.english<<" "<<s.total<<endl;          return out;      }            int main( )      {          Student stud[100];           int i,n;          string sname;          double scpp, smath, senglish;          ifstream infile("score.dat",ios::in);            if(!infile)               {              cerr<<"open error!"<<endl;              exit(1);          }          for(i=0;i<100;i++)          {              infile>>n>>sname>>scpp>>smath>>senglish;              stud[i].set_value(n,sname, scpp, smath, senglish);          }          infile.close();          ofstream outfile("binary_score.dat",ios::out|ios::binary);          if(!outfile)          {              cerr<<"open error!"<<endl;              exit(1);          }          for(i=0;i<100;i++)          {              outfile.write((char*)&stud[i], sizeof(stud[i]));          }          cout<<"输入你自己的信息:";          cin>>n>>sname>>scpp>>smath>>senglish;          Student me(n,sname, scpp, smath, senglish);          outfile.write((char*)&me, sizeof(me));          outfile.close();          Student s;          ifstream infile2("binary_score.dat",ios::in|ios::binary);          if(!infile2)          {              cerr<<"open error!"<<endl;              exit(1);          }          while(true)          {              infile2.read((char*)&s, sizeof(s));              if(infile2.eof()) break;              cout<<s;          }          infile2.close();          return 0;  }


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