第十七周实验报告一

1. 程序的版权和版本声明部分 
2. * Copyright (c) 2011, 烟台大学计算机学院学生 
3. * All rights reserved. 
4. * 文件名称： 
5. * 作者：李君凯 
6. * 完成日期： 2012年 6月 18日
7. * 版本号： 
8. *对任务及求解方法的描述部分

9. #include<iostream> #include <string>using namespace std;#include<fstream>class Student{public:double get_total();double get_average();friend void input(Student *stu) ;friend void input1(Student *stu) ;friend void output(Student *stu);friend void output1(Student *stu);friend void output_max(Student *stu);friend void paixu(Student *stu);friend void get_total(Student *stu);private:string name;double c_score;double m_score;double e_score;double total;double average;};double Student::get_total(){(this->total) = (this->c_score + this->e_score + this->m_score);return (this->total);}double Student::get_average(){(this->average) = (this->c_score + this->e_score + this->m_score)/3;return (this->average);}void input(Student stu[]){string name;int i;ifstream inFile("score.dat",ios::in);if(!inFile){cerr<<"open error!"<<endl;exit(1);}for( i=0;i<100;++i){inFile>>stu[i].name;inFile>>stu[i].c_score;inFile>>stu[i].e_score;inFile>>stu[i].m_score;}inFile.close();}void input1(Student stu[]){string name;ifstream inFile("binary_score.dat",ios::in);if(!inFile){cerr<<"open error!"<<endl;exit(1);}for( int i=0;i<101;++i){inFile>>stu[i].name;inFile>>stu[i].c_score;inFile>>stu[i].e_score;inFile>>stu[i].m_score;inFile>>stu[i].total;}inFile.close();}void output(Student *stu){ofstream writeFile("binary_score.dat",ios::out);if(!writeFile){cerr<<"open error!"<<endl;exit(1);}for(int i=0;i<100;++i){writeFile<<stu[i].name<<" ";writeFile<<stu[i].c_score<<" ";writeFile<<stu[i].e_score<<" ";writeFile<<stu[i].m_score<<" ";//writeFile<<stu[i].average<<" ";writeFile<<stu[i].total<<" ";}writeFile<<"李君凯"<<" ";writeFile<<"100"<<" ";writeFile<<"100"<<" ";writeFile<<"100"<<" ";    writeFile<<"300"<<" ";writeFile.close();}void output1(Student *stu){for(int i=0;i<101;++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].average;//cout<<stu[i].average<<" ";//writeFile<<stu[i].total;cout<<stu[i].total<<" ";cout<<endl;}//writeFile.close();}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<101;++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<<max1<<endl;cout<<max2<<endl;cout<<max3<<endl;cout<<max4<<endl;}void paixu(Student *stu){Student t;for( int i=0;i<101;++i){stu[i].get_total();stu[i].get_average();}for(int j=0;j<100;++j)for(int i=0;i<100-j;++i){if(stu[i].total<stu[i+1].total){t=stu[i];stu[i]=stu[i+1];stu[i+1]=t;}}}void get_total(Student *stu){for(int i=0;i<100;i++)stu[i].get_total();}int main(){Student stu[101]; input(stu);get_total(stu);output(stu);input1(stu);output_max(stu);paixu(stu);output1(stu);system("PAUSE");  return 0;  }