求助大佬，实在看不出哪错了

wjklprqy @ 2022-11-10 17:15:00

#include <iostream>
#include <algorithm>

using namespace std;

const int N = 310;

int n;

struct student{
    int name;
    double chinese;
    double score;
}stu[N];

bool cmp(student a, student b)
{
    if (a.score != b.score) return a.score > b.score;
    else
    {
        if (a.chinese != a.chinese) return a.chinese > b.chinese;
        else return a.name < b.name;
    }
}

int main()
{
    double a, b, c;
    cin >> n;

    for (int i = 1; i <= n; i ++ )
    {
        cin >> a >> b >> c;
        stu[i].name = i;
        stu[i].chinese = a;
        stu[i].score = a + b + c;
    }

    sort(stu + 1, stu + n + 1, cmp);

    for (int i = 1; i <= 5; i ++ )
    {
        cout << stu[i].name << " " << stu[i].score << endl;
    }

    return 0;
}

by jiangjintao009 @ 2022-11-10 17:53:27

那道

by Castaways @ 2022-12-29 19:35:29

cmp函数没必要写的这么复杂，可以在结构体里面重载大于号。我照着你的代码改了一下。

Code

#include <iostream>
#include <algorithm>

using namespace std;

const int N = 310;

int n;

struct student{
    int name;
    double chinese;
    double score;
    bool operator > (const student &b) const{
        if(score!=b.score) return score>b.score;
        if(chinese!=b.chinese) return chinese>b.chinese;
        return name<b.name;
    }
}stu[N];

//bool cmp(student a, student b)
//{
//    if (a.score != b.score) return a.score > b.score;
//    else
//    {
//        if (a.chinese != a.chinese) return a.chinese > b.chinese;
//        else return a.name < b.name;
//    }
//}
bool cmp(student x,student y){return x>y;}
int main()
{
    double a, b, c;
    cin >> n;

    for (int i = 1; i <= n; i ++ )
    {
        cin >> a >> b >> c;
        stu[i].name = i;
        stu[i].chinese = a;
        stu[i].score = a + b + c;
    }

    sort(stu + 1, stu + n + 1, cmp);

    for (int i = 1; i <= 5; i ++ )
    {
        cout << stu[i].name << " " << stu[i].score << endl;
    }

    return 0;
}