// demonstrates the call-by-value effect
// Walt Savitch
// 2/10/00

#include <iostream>
using namespace std;

const int RATE = 100; // dollars per quarter hour.

int fee(int hours_worked, int minutes_worked); // computes fee

int main( ) {
  int hours, minutes; // time worked
  int bill;// money to bill

  // output greeting
  cout << "Welcome to the offices of\n"
       << "Dewey, Cheatham, and Howe.\n"
       << "The law office with a heart.\n"
       << "Enter the hours and minutes"
       << " of your consultation:\n";
  cin >> hours >> minutes;

  bill = fee(hours, minutes);

  // the change in the local parameter of fee does not
  // affect the value of "minutes"
  cout << "For " << hours << " hours and " << minutes
       << " minutes, your bill is $" << bill << endl;
}

// returns the charges for hours_worked hours and
// minutes_worked minutes of legal services.
int fee(int hours_worked, int minutes_worked) {
  int quarter_hours;  // local variable

  // notice the formal parameter changes
  minutes_worked = hours_worked*60 + minutes_worked;
  quarter_hours = minutes_worked/15;
  return (quarter_hours*RATE);
}