259201 Lab9.4

#include <iostream>
#include <cmath>
using namespace std;
int main()
{
    int n,min[3],max[3];
    int sum[] = {0,0,0};

    cout<<"How many students? ";
    cin>>n;

    float score[3][n];
    for( int i = 0 ; i < 3 ; i++ )
    {
        cout<<"Enter scores of subject no."<<i+1<<endl;
        for( int j = 0 ; j < n ; j++ )
        {
            cin>>score[i][j];
            sum[i] += score[i][j];
        }
    }

    float avg[3],sigma[3];

    for(int k = 0 ; k < 3 ; k++)
    {
        avg[k] = sum[k]/n;
        min[k] = max[k] = score[k][0];
        for(int l = 0 ; l < n ; l++)
        {
            sigma[k] += pow(score[k][l] - avg[k] , 2);
            if(score[k][l] > max[k])
            {
                max[k] = score[k][l];
            }
            if(score[k][l] < min[k])
            {
                min[k] = score[k][l];
            }
        }
    }

    for(int m = 0 ; m < 3 ; m++)
    {
        cout<<"Max"<<m+1<<" = "<<max[m]<<"\t";
        cout<<"Min"<<m+1<<" = "<<min[m]<<"\t";
        cout<<"Avg"<<m+1<<" = "<<avg[m]<<"\t";
        cout<<"SD"<<m+1<<" = "<<sqrt(sigma[m]/n)<<endl;
    }
}