score

#include<iostream>
using namespace std;
class student{
public:
    int Input()
    {
        for(i=0;i<5;i++)
        {
            cout<<"Please Input "<<i+1<<" Student's Number And Scores:"<<endl;
            cin>>number[i];
            for(j=0;j<5;j++)
                cin>>score[i][j];
        }
        return 0;
    }

    int calculateall()
    {
        for(i=0;i<5;i++)
        {
            ave[i]=0;
            for(j=0;j<5;j++)
                ave[i]=ave[i]+score[i][j];
            ave[i]=ave[i]/5.0;
        }
        
        return 0;
    }
    int calculateone(int n)
    {
        average=0;
        for(i=0;i<5;i++)
            average+=score[i][n];
        return average/5.0;
    }
    int Output()
    {
        calculateall();
        for(i=0;i<5;i++)
        {
            cout<<"The number is "<<number[i]<<endl;
            for(j=0;j<6;j++)
                cout<<score[i][j]<<" ";
            cout<<endl;
            cout<<"The average is "<<ave[i]<<endl;
        }
        return 0;
    }
private:
    char number[5][10];
    double score[5][5];
    double ave[5];
    double average;
    int i;
    int j;
};

int main()
{
    int n;
    class student stu1;
    stu1.Input();
    stu1.Output();
    cout<<"Please input the number of the class which you want calculate(0,1,2,3,4):"<<endl;
    cin>>n;
    cout<<"The class's average is: "<<stu1.calculateone(n)<<endl;
    return 0;
}