十六周任务2：成绩排序

#include<iostream> #include <string>using namespace std;#include<fstream>class Student{public://Student(string name, double c_score, double m_score, double e_score, double total):this->name(name), this->c_score(c_score), this->m_score(m_score), this->e_score(e_score), this->total(total){}  double get_total();void get_name(string name);void get_c_score(double c_score);void get_m_score(double m_score);void get_e_score(double e_score);friend void input(Student *stu) ;friend void output(Student *stu);friend void output_max(Student *stu);friend void ordered_student(Student std[]); private:string name;double c_score;double m_score;double e_score;double total;};//总分的计算double Student::get_total(){(this->total) = (this->c_score + this->e_score + this->m_score);return (this->total);}void Student::get_name(string name){this->name = name;}void Student::get_c_score(double c_score){this->c_score = c_score;}void Student::get_m_score(double m_score){this->m_score = m_score;}void Student::get_e_score(double e_score){this->e_score = e_score;}//从文件中读取数据void input(Student stu[]){string name;int i;double c_score;double m_score;double e_score;ifstream inFile("score.dat",ios::in);if(!inFile){cerr<<"open error!"<<endl;exit(1);//提示错误}for( i=0;i<100;++i){inFile>>name;stu[i].get_name( name);inFile>>c_score;stu[i].get_c_score( c_score);inFile>>e_score;stu[i].get_e_score( e_score);inFile>>m_score;stu[i].get_m_score( m_score);}inFile.close();//关闭文件}void output(Student *stu)//输出数据{ofstream writeFile("odered_score.dat",ios::out);if(!writeFile){cerr<<"open error!"<<endl;exit(1);}for(int i=0;i<100;++i){writeFile<<stu[i].name;cout<<stu[i].name<<" ";writeFile<<stu[i].c_score;cout<<stu[i].c_score<<" ";writeFile<<stu[i].e_score;cout<<stu[i].e_score<<" ";writeFile<<stu[i].m_score;cout<<stu[i].m_score<<" ";writeFile<<stu[i].total;cout<<stu[i].total<<" ";cout<<endl;}writeFile.close();//关闭文件}//求最大数void output_max(Student *stu){double max1,max2,max3,max4;max1=stu[0].c_score;max2=stu[0].m_score;max3=stu[0].e_score;max4=stu[0].get_total();for(int i=0;i<100;++i){if(stu[i].c_score>max1){max1=stu[i].c_score;}if(stu[i].m_score>max2){max2=stu[i].m_score;}if(stu[i].e_score>max3){max3=stu[i].e_score;}if(stu[i].get_total()>max4){max4=stu[i].get_total();}}cout<<"c++的最高成绩是："<<max1<<endl;cout<<"高数的最高成绩是："<<max2<<endl;cout<<"英语的最高成绩是："<<max3<<endl;cout<<"总分的最高成绩是："<<max4<<endl;}//排序void ordered_student(Student std[])  {  int i, j;  Student t;  for(i = 0; i < 100; ++ i)  {  for(j = 0; j < 100; ++j)  {  if(std[i].total > std[j].total)  {  t = std[i];  std[i] = std[j];  std[j] = t;  }  }  }  }  int main(){Student stu[100];     input(stu);output_max(stu);ordered_student(stu);output(stu);    cout<<endl;  system("PAUSE");      return 0;  }

感言：

这个程序还比较复杂，用到以前的知识点比较多，也顺便复习了一下。。。感觉不错。。。