//ic210 section 4002 
//16 nov 2009
/*********************************************
This program reads in student/grade data from
namedgrades.txt, gets a name from the user and
prints out that student's homework average.
**********************************************/
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

/*********************************************
 ** PROTOTYPES & STRUCT DEFINITIONS
 *********************************************/
struct Mid
{
	string name;
	int* grades;
}

double computeAvg(int*, int);

/*********************************************
 ** MAIN FUNCTION
 *********************************************/
int main()
{
  // Open file and read header info
  int Ns, Nh;
  string junk;
  ifstream IN("namedgrades.txt");
  IN >> Ns >> junk >> Nh >> junk;

  Mid* mids;

  //allocate space for mids
  mids = new Mid[Ns];
  //allocate space for grades for each mid
  for (int k = 0; k < Ns; k++)
  {
	  mids[k].grades = new int[Nh];
  }

  //read mids
  for (int i = 0; i<Ns; i++)
  {
	  //read one student
	  //read name
	  IN >> mids[i].name;
	  
	  //read grades
	  for (int j = 0; j < Nh ; j++)
	  {
		  IN >> mids[i].grades[j];
	  }
  
  }

  //find a student and compute the homework average
  string midName;
  cout << "Enter student name ";
  cin >> midName;

  double avg = 0;
  //find position of student 
  for (int ii = 0; ii < Ns; ii++)
  {
	  if (mids[ii].name == midName)
	  {
		//exit the loop
		  break;
	  }
  }

  //output average
  if (ii < Ns)
  {
	  cout << "Homework average for student "<< midName 
		  << " is " << computeAvg(mids[ii].grades, Nh);
  }
  else
  {
	  cout << "Student not found" << endl;
  }


    return 0;
}

//compute the average of an array of grades
double computeAvg(int* A, int size)
{
	int sum = 0;
	for (int i = 0; i < size; i++)
	{
		sum = sum + A[i];
	}

	double avg = (double)sum/size;
	return avg;
}