第14周项目3(2)-多科成绩单

/*
 *Copyright (c) 2014, 烟台大学计算机学院
 *All rights reserved.
 *文件名称：week14-project3-2.cpp
 *作者：高赞
 *完成日期：2014年 11 月 29 日
 *版本号：v1.0
 *
 *问题描述：在3-1基础上增加学生姓名操作
 */
#include<iostream>
#include<string>
using namespace std;
void input(double s[][4],int n); //输入成绩
void output(double s[][4],int n); //输出成绩
void sname(double score,double s[][4],int n,int i);
double max(double s[][4],int n,int i); //求第i门课的最高成绩，i=3时是总分
double min(double s[][4],int n,int i); //求第i门课的最低成绩
double avg(double s[][4],int n,int i); //求第i门课的平均成绩
void sname(double score,double s[][4],int n,int i);
string course[4]= {"高等数学","英语","C++","总分"};
string name[100];
double cmax,cmin;
int main()
{
    int i,num;
    string temp;
    double score[100][4]; //设一个班最多100人，实际按输入来
    cout<< "输入学生人数：";
    cin>> num;
    //（1）输入成绩并求出总分
    input(score,num);
    //（2）输出成绩
    output(score,num);
    //（3）输出各门课及总分的最高成绩、最低成绩、平均成绩
    for(i=0; i<4; ++i)
    {
         cmax=max(score,num,i);
         cmin=min(score,num,i);
        cout<< course[i] << "最高成绩是" << cmax << endl
            << "取得最高成绩的同学是: ";
        sname(cmax,score,num,i);
        cout<< "最低成绩是" << cmin << endl
            << "最低成绩的同学是：";
        sname(cmin,score,num,i);
        cout<< "平均成绩是" << avg(score,num,i);
        cout<< endl << endl;
    }
    return 0;
}
void input(double s[][4],int n)
{
    double sum;
    for (int i=0; i<n; ++i)
    {
        cout << "请输入学号" << i << "的同学的姓名：" ;
        cin >> name[i];
        sum=0;
        for(int j=0; j<3; ++j)
        {
            cout << "请输入" << course[j] << "成绩: ";
            cin >> s[i][j];
            sum+=s[i][j];
        }
        s[i][3]=sum;
    }
}
void output(double s[][4],int n)
{
    cout << endl
         << "............统计结果............" << endl;
    for (int i=0; i<n; ++i)
    {
        cout << "学号" << i << "的同学成绩：" << endl;
        for(int j=0; j<4; ++j)
            cout << course[j] << ": " << s[i][j] << endl;
        cout << endl;
    }
}
double max(double s[][4],int n,int i)
{
    cmax=s[0][i];
    for (int j=1; j<n; ++j)
    {
        if(s[j][i]>cmax)
            cmax=s[j][i];
    }
    return cmax;
}
double min(double s[][4],int n,int i)
{
    cmin=s[0][i];
    for (int j=1; j<n; ++j)
    {
        if(s[j][i]<cmin)
            cmin=s[j][i];
    }
    return cmin;
}
double avg(double s[][4],int n,int i)
{
    double ave,sum=0;
    for (int j=0; j<n; ++j)
        sum+=s[j][i];
    ave=sum/n;
    return ave;
}
void sname(double score,double s[][4],int n,int i)
{
    for(int j=0; j<n;++j)
    {
        if (s[j][i]==score)
            cout << name[j] << ", ";
    }
    cout << endl;
}

运算结果：