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

using namespace std;

void getData(ifstream &infile, float &len, float &wid);
void calcAreaPerim(float len, float wid, float &area, float &perim);
void print(float len, float wid, float area, float perim);

int main()
{
  float len, wid, area, perim;
  ifstream infile;

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

  // print heading
  cout << setprecision(3) << fixed << showpoint;
  cout << endl;
  cout << setw(15) << "Length" << setw(15) << "Width"
       << setw(15) << "Area" << setw(15) << "Perimeter" << endl;

  
  getData(infile, len, wid);
  while (!infile.eof())
    {
      calcAreaPerim(len, wid, area, perim);
      print(len, wid, area, perim);
      getData(infile, len, wid);
    } // end !eof

  infile.close(); // close file

  return 0;
}  // end main


void getData(ifstream &infile, float &len, float &wid)
{
  infile >> len >> wid;
  return;
}  // end function getData

void calcAreaPerim(float len, float wid, float &area, float &perim)
{
  area = len * wid;
  perim = (2 * len) + (2 * wid);
  return;
}  // end function calcAreaPerim


void print(float len, float wid, float area, float perim)
{
  cout << setw(15) << len << setw(15) << wid
       << setw(15) << area << setw(15) << perim << endl;
  return;
}  // end function print