14周(多课程成绩表)

/*

*copyright(c) 2014,烟台大学计算机学院

*All rights reserved。

*文件名称：14周(多课程成绩表)

*作者：王忠

*完成日期：2014.12.01

*版本号：v1.0

*

*问题描述：输入同学各科成绩,自动求出总分,最高,最低,平均分.

*输入描述：各科成绩

*程序输出：总分,最高,最低,平均分.

#include <iostream>
#include <string>
using namespace std;
void input(double s[][4],int n);
void output(double s[][4],int n);
double max(double s[][4],int n,int i);
double min(double s[][4],int n,int i);
double avg(double s[][4],int n,int i);
int main()
{
    int i,num;
    string temp;
    double score[100][4];
    string course[4]= {"高等数学","英语","c++","总分"};
    cout<<"输入学生人数:";
    cin>>num;
    for(i=0; i<4; i++)
    {
        cout<<course[i]<<"\t";
    }
    cout<<endl;
    input(score,num);
    output(score,num);
    for(i=0; i<3; ++i)
    {
        cout<<course[i]<<"的最高成绩是"<<max(score,num,i)<<",";
        cout<<"最低成绩是"<<min(score,num,i)<<",";
        cout<<"平均成绩为"<<avg(score,num,i)<<",";
        cout<<endl;
    }
}
void input(double score[][4],int num)
{
    int sum=0,i,j;
    for (i=0; i<num; i++)
    {
        for(j=0; j<3; j++)
        {
            cin>>score[i][j];
            sum=sum+score[i][j];
        }
        score[i][j]=sum;
        sum=0;
        cout<<score[i][j];
        cout<<endl;
    }
}
void output(double score[][4],int num)
{
    int i,j;
    for (i=0; i<num; i++)
    {
        for(j=0; j<4; j++)
            cout<<score[i][j]<<"\t";
        cout<<endl;
    }

}
double max(double score[][4],int n,int i)
{
    int j=0,d;
    d=score[j][i];
    for(; j<n; ++j)
    {
        if(d<score[j][i])
            d=score[j][i];
    }
    return d;
}
double min(double score[][4],int n,int i)
{
    int j=0,x;
    x=score[j][i];
    for(; j<n; ++j)
    {
        if(x>score[j][i])
            x=score[j][i];
    }
    return x;
}
double avg(double score[][4],int n,int i)
{
    int j=0,sum;
    double average;
    for(; j<n; ++j)
        sum=sum+score[j][i];
    average=sum/n;
    return average;
}