Describe CPPStudy_2005_1/STL성적처리_3_class here.
~cpp #include <fstream> #include <iostream> #include <string> #include <vector> #include <algorithm> //sort #include <numeric> //accumulate const int SUBJECT_NO = 4; using namespace std; class student_table { public: void readdata();//파일로부터 데이터를 읽어온다 void printdata(); //출력 void operation(); //총합과 평균 vector<student_table>::iterator zbegin() { return ztable.begin(); } vector<student_table>::iterator zend() { return ztable.end(); } double average() {return avg;} private: string name; vector<int> score; unsigned int total; double avg; vector<student_table> ztable; }; bool zcompare(student_table& x,student_table& y); //sort시 비교 조건 int main() { student_table z; //자료를 읽는다. z.readdata(); //총점과 평균 z.operation(); //평균으로 정렬 sort(z.zbegin(),z.zend(),zcompare); //출력 z.printdata(); return 0; } //파일로부터 데이터를 읽어온다 void student_table::readdata(){ ifstream fin("data.txt"); student_table tmp; int tmp2,i; while(1) { fin >> tmp.name; for(i=1;i<=SUBJECT_NO;i++) { fin >> tmp2; tmp.score.push_back(tmp2); } if(fin.eof()) break; ztable.push_back(tmp); } } //sort시 비교 조건 bool zcompare(student_table& x,student_table& y) { return x.average() > y.average(); } //출력하기 void student_table::printdata() { int cnt=0; cout << "이름\t국어\t영어\t수학\t과학\t총점\t평균" << endl; for(vector<student_table>::iterator i=ztable.begin();i<ztable.end();++i) { cout << i->name << "\t" << i->score[cnt*4+0] << "\t" << i->score[cnt*4+1] << "\t" << i->score[cnt*4+2] << "\t" << i->score[cnt*4+3] << "\t" << i->total << "\t" << i->avg <<endl; cnt++; } } void student_table::operation() { for(vector<student_table>::iterator i=ztable.begin() ;i<ztable.end();++i) { i->total = accumulate(i->score.begin()+i->score.size()-4,i->score.end(),0); i->avg = i->total/4.0; } }