12/12講座問題2

class_sort.cpp

#include <stdio.h>                                                      
#include <algorithm>
using namespace std;

class Student {
  public:
    char name;
    int math, eng;
  bool operator < (const Student &s ) const {
    if(math == s.math)
      return eng > s.eng;
    return math > s.math;
  }
};

int main() {
  Student stu[5];
  stu[0].name = 'a'; stu[0].math = 2; stu[0].eng = 8;
  stu[1].name = 'b'; stu[1].math = 9; stu[1].eng = 3;
  stu[2].name = 'c'; stu[2].math = 8; stu[2].eng = 3;
  stu[3].name = 'd'; stu[3].math = 2; stu[3].eng = 2;
  stu[4].name = 'e'; stu[4].math = 5; stu[4].eng = 3;

  sort( stu, stu + 5);

  for(int i=0; i<5; i++) {
    printf("%c %d %d\n", stu[i].name, stu[i].math, stu[i].eng);
  }
}