/*
   testfunc12.cpp
   CIS 150
   6/9/2005
   David Klick
   
   Passing arguments by reference.
*/

#include <iostream>
using std::cout;
using std::cin;

void getDimensions(double &height, double &width);

int main(void) {
   double h, w;   // height and width

   cout << "Rectangle area calculator\n";
   getDimensions(h, w);
   cout << "The area is " << (h*w) << '\n';
   return 0;
}

/*
   Gets height and width from user.
*/
void getDimensions(double &height, double &width) {
   // get height
   do {
      cout << "Enter height: ";
      cin >> height;
      if (height < 0.0) cout << "Error: height must be positive\n";
   } while (height < 0.0);
   
   // get width
   do {
      cout << "Enter width: ";
      cin >> width;
      if (width < 0.0) cout << "Error: width must be positive\n";
   } while (width < 0.0);
}