西安交通大学915-2016-编程3

#include <iostream>
using namespace std;

enum STATUS {
    NORMAL = 0,  // 正常
    LATE = 1,    // 迟到
    LEAVE = 2,   // 请假
    ABSENT = 3   // 旷课
};

struct Student {
    int id;
    int course[4];
    int sum;
};

const int N = 110;
Student arr[N];

int main() {
    int n, sum;
    cout << "please input the number of student:";
    cin >> n;
    cout << "please input the number of course:";
    cin >> sum;
    for (int i = 0; i < n; i++) {
        cout << "please input the student's id:";
        cin >> arr[i].id;
        cout << "please input the student's course status:";
        int status;
        cin >> status;
        arr[i].course[status]++;
        arr[i].sum = sum;
    }
    
    // 每个人的出勤情况
    for (int i = 0; i < n; i++) {
        double normal_rate = 1.0 * (arr[i].course[0]) / arr[i].sum;
        double late_rate = 1.0 * (arr[i].course[1]) / arr[i].sum;
        double leave_rate = 1.0 * (arr[i].course[2]) / arr[i].sum;
        double absent_rate = 1.0 * (arr[i].course[3]) / arr[i].sum;
        printf("id = %d, normal_rate = %lf, late_rate = %lf, leave_rate = %lf, absent_rate = %lf\n", arr[i].id, normal_rate, late_rate, leave_rate, absent_rate);
    }

    int normal = 0;
    int late = 0;
    int leave = 0;
    int absent = 0;

    for (int i = 0; i < n; i++) {
        normal += arr[i].course[0];
        late += arr[i].course[1];
        leave += arr[i].course[2];
        absent += arr[i].course[3];
    }

    // 课程的情况
    printf("course : normal_rate = %lf, late_rate = %lf, leave_rate = %lf, absent_rate = %lf\n",
        normal * 1.0 / n * sum, late * 1.0 / n * sum, leave * 1.0 / n * sum, absent * 1.0 / n * sum);
    return 0;
}