#include <iostream>
#include <iomanip>
#include <fstream>

using namespace std;

#define MAX 100

void getData(int &size, float len[], float wid[]);
void calcAreaPerim(int size, float len[], float wid[], 
		   float area[], float perim[]);
void print(int size, float len[], float wid[], float area[], float perim[]);

int main()
{
  float len[MAX], wid[MAX], area[MAX], perim[MAX];
  int size;  // array sizeex

  getData(size, len, wid);
  calcAreaPerim(size, len, wid, area, perim);
  print(size, len, wid, area, perim);

  return 0;
}  // end main


void getData(int &size, float len[], float wid[])
{
  ifstream infile;

  infile.open("shapes.data");
  if (infile.fail())
    {
      cout << "ERROR opening input file shapes.data" << endl << endl;
      exit(0);
    }  // end if fail

  size = 0; // initialize array size to 0

  infile >> len[size] >> wid[size];
  // Read to EOF and also make sure not out-of-bounds on array
  while ((size < MAX) && (!infile.eof()))
    {
      size++; 
      infile >> len[size] >> wid[size];
    } // end !eof

  infile.close();

  return;
}  // end function getData


void calcAreaPerim(int size, float len[], float wid[], 
		   float area[], float perim[])
{
  for (int i = 0; i < size; i++)
    {
      area[i] = len[i] * wid[i];
      perim[i] = (2 * len[i]) + (2 * wid[i]);
    }

  return;
}  // end function calcAreaPerim


void print(int size, float len[], float wid[], float area[], float perim[])
{  
  // print heading
  cout << setprecision(3) << fixed << showpoint;
  cout << endl;
  cout << setw(15) << "Length" << setw(15) << "Width"
       << setw(15) << "Area" << setw(15) << "Perimeter" << endl;

  for (int i = 0; i < size; i++)
    {
      cout << setw(15) << len[i] << setw(15) << wid[i]
	   << setw(15) << area[i] << setw(15) << perim[i] << endl;
    }

  return;
}  // end function print