定义一个学生成绩结构体类型,包含“学号”、“姓名”、“性别”、“年龄”、“班级”、“英语”、“数学”、“物理”、“总分”、“名次”等信息。编写6个函数分别用于: (1) 使用结构体数组,输入全班10名

学生的信息；(2) 计算每个学生的总分和平均分；(3) 对全班学生按照总分从高到低排序；(4) 统计每个班级的平均总分；(5) 统计全班英语、数学、物理三门科目的平均分；(6) 根据学生总分排名输出学生信息。

以下是代码实现：

#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

const int N = 10;

struct Student {
    string id;
    string name;
    string gender;
    int age;
    string cls;
    float eng;
    float math;
    float phy;
    float total;
    int rank;
};

void input(Student stus[]) {
    for (int i = 0; i < N; i++) {
        cout << "请输入第" << i + 1 << "个学生的信息：" << endl;
        cout << "学号：";
        cin >> stus[i].id;
        cout << "姓名：";
        cin >> stus[i].name;
        cout << "性别：";
        cin >> stus[i].gender;
        cout << "年龄：";
        cin >> stus[i].age;
        cout << "班级：";
        cin >> stus[i].cls;
        cout << "英语成绩：";
        cin >> stus[i].eng;
        cout << "数学成绩：";
        cin >> stus[i].math;
        cout << "物理成绩：";
        cin >> stus[i].phy;
    }
}

void calcTotal(Student stus[]) {
    for (int i = 0; i < N; i++) {
        stus[i].total = stus[i].eng + stus[i].math + stus[i].phy;
    }
}

void calcRank(Student stus[]) {
    sort(stus, stus + N, [](const Student& a, const Student& b) {
        return a.total > b.total;
    });
    for (int i = 0; i < N; i++) {
        stus[i].rank = i + 1;
    }
}

void calcAvg(Student stus[], float& engAvg, float& mathAvg, float& phyAvg) {
    float engSum = 0, mathSum = 0, phySum = 0;
    for (int i = 0; i < N; i++) {
        engSum += stus[i].eng;
        mathSum += stus[i].math;
        phySum += stus[i].phy;
    }
    engAvg = engSum / N;
    mathAvg = mathSum / N;
    phyAvg = phySum / N;
}

void calcClsAvg(Student stus[], float& cls1Avg, float& cls2Avg) {
    float cls1Sum = 0, cls2Sum = 0;
    int cls1Cnt = 0, cls2Cnt = 0;
    for (int i = 0; i < N; i++) {
        if (stus[i].cls == "1") {
            cls1Sum += stus[i].total;
            cls1Cnt++;
        }
        else {
            cls2Sum += stus[i].total;
            cls2Cnt++;
        }
    }
    cls1Avg = cls1Sum / cls1Cnt;
    cls2Avg = cls2Sum / cls2Cnt;
}

void printRank(Student stus[]) {
    cout << "学号\t姓名\t性别\t年龄\t班级\t英语\t数学\t物理\t总分\t名次" << endl;
    for (int i = 0; i < N; i++) {
        cout << stus[i].id << "\t" << stus[i].name << "\t" << stus[i].gender << "\t" << stus[i].age << "\t" << stus[i].cls << "\t" << stus[i].eng << "\t" << stus[i].math << "\t" << stus[i].phy << "\t" << stus[i].total << "\t" << stus[i].rank << endl;
    }
}

int main() {
    Student stus[N];
    float engAvg = 0, mathAvg = 0, phyAvg = 0;
    float cls1Avg = 0, cls2Avg = 0;

    input(stus);
    calcTotal(stus);
    calcRank(stus);
    calcAvg(stus, engAvg, mathAvg, phyAvg);
    calcClsAvg(stus, cls1Avg, cls2Avg);
    printRank(stus);

    cout << "全班英语平均分：" << engAvg << endl;
    cout << "全班数学平均分：" << mathAvg << endl;
    cout << "全班物理平均分：" << phyAvg << endl;
    cout << "1班平均总分：" << cls1Avg << endl;
    cout << "2班平均总分：" << cls2Avg << endl;

    return 0;
}