#include <iostream.h>
#include <fstream.h>
#include <iomanip.h>
#include <cstdlib>

//Precondition all 4 grades and student numbers have been read from file
//it calculates the max score and returns integer to max main
int computing_max (int sc1, int sc2, int sc3, int sc4)

{ int max=sc1;
  if(sc2>max)
    max=sc2;
  if (sc3>max)
    max=sc3;
  if (sc4>max)
    max=sc4;
  return max;
}

//Precondition all 4 grades and student number have been read from file
//it calculates the min score and returns integer min to main
int computing_min (int sc1, int sc2, int sc3, int sc4)
{ int min = sc1;
  if (sc2<min)
    min=sc2;
  if (sc3<min)
    min=sc3;
  if (sc4<min)
    min=sc4;
  return min;
}

//Precondition: Student number and 4 grades have been read from file
//it calculates the average score and returns double ave to main
double computing_ave(int sc1, int sc2, int sc3, int sc4)
{
    double ave=(sc1+sc2+sc3+sc4)/4.0;
    return ave;
}
 
 
int main()
{
    int gr1,gr2,gr3,gr4,high_grade,low_grade,student_number=0,best;
    char filein[10],fileout[10];
    double average,temp=0.0;
    cout<<"Enter Name of file containing data....";
    cin>>filein;
    cout<<"Enter filename to save information to.......";
    cin>>fileout;
    ifstream infile;
    ofstream outfile;
    infile.open(filein);
    if (infile.fail())  
        {
         cout<<"Opening file failed.. Now exiting...";
         exit(1);
        }
    cout<<"Opening "<<filein<<"......\n\n";
    outfile.open(fileout);
    if (outfile.fail())   
        { cout<<"Opening outfile failed...exiting....";
           exit(1);
        }
    cout<<"Opening outfile "<<fileout<<"....\n\n";
    outfile.setf(ios::fixed);
    outfile.setf(ios::showpoint);
    outfile.precision(2);
    outfile<<"Student#"<<setw(11)<<"Max-Score"<<setw(11)<<"Min-Score"
               <<setw(12)<<"Ave-Score\n";
   
infile>>student_number>>gr1>>gr2>>gr3>>gr4;
    while (!infile.eof())
      { cout<<"Calculating student "<<student_number<<endl;
        high_grade=computing_max(gr1,gr2,gr3,gr4);
        low_grade=computing_min(gr1,gr2,gr3,gr4); 
        average=computing_ave(gr1,gr2,gr3,gr4);   
        if (average>temp)
            {   best=student_number;
                temp=average;
            }
        outfile<<setw(4)<<student_number<<setw(14)<<high_grade;
        outfile<<setw(11)<<low_grade<<setw(11)<<average<<endl; 
        infile>>student_number>>gr1>>gr2>>gr3>>gr4; 
       }
        
    outfile<<"The best student is student number "<<best<<endl<<endl;
    infile.close();
    outfile.close();
    infile.open("grades.txt");
    outfile.open("stats.txt",ios::app);
    outfile<<"Original data.."<<endl;  
    outfile<<"Student#"<<setw(7)<<"Score1"<<setw(7)<<"Score2"
           <<setw(7)<<"Score3"<<setw(7)<<"Score4"<<endl;
    infile>>student_number>>gr1>>gr2>>gr3>>gr4;
    while (!infile.eof())
    {
        outfile<<setw(4)<<student_number<<setw(9)<<gr1<<setw(7)<<gr2<<setw(7)<<gr3<<setw(7)<<gr4<<endl;
        infile>>student_number>>gr1>>gr2>>gr3>>gr4;
    }
    infile.close();
    outfile.close();
    cout<<"Done!";  
    return 0;
}