/* more basics about pointers, including passing pointer type variables 
   to functions 
*/

#include<iostream.h>

double area(double*,double*);

void main(){

  int c=5, *b;
  b = &c;
  cout << b << " " << c << endl;
  c++;
  cout << *b << endl;
  (*b) ++;
  cout << c << endl;

  double *width_address, *length_address;

  // double* width_address, length_address would declare length_address to
  // be type double, not type double*.

  double width, length;

  cout << "Enter the width and length of the rectangle: ";
  cin >> width >> length;

  width_address = &width;
  length_address = &length;

  cout << "The area of the rectangle is " 
       << area(width_address,length_address) << ".\n";
}

double area (double * w_address, double * l_address){
  return (* w_address) * (* l_address);
}