CS 250 Computer Programming and Problem Solving - FALL 1998 |
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Object Oriented Design:
Case Study: Doctor Scheduling
Version 3:
void Scheduler::ScheduleAllAppointments()
// schedules appointments until the day is over
{
while( ScheduleOneAppointment() ) //high level loop
continue;
}
bool Scheduler::ScheduleOneAppointment()
// Choose a doctor, input patient name, and
// ask for a particular time slot. Make the
// appointment, and display the results.
{
Name aPatient; // probably should be a real object
cin >> aPatient;
int doctorNum = ChooseDoctor(); // private function to simplify
Doctor & theDoc = doctors[doctorNum];
ChooseTimeSlot( theDoc, aPatient ); // private function to simplify
return getYN("Continue?"); // ask if end of day
}
//### private member functions of the Scheduler (see updated specification file)
// Show patient list of doctor's names and let patient choose one.
// Display list of doctor names and numbers. Let user
// enter a number, and return this as the function result.
int Scheduler::ChooseDoctor() const
{
int n = 0;
cout << "Please choose one of the following doctor's by number:\n";
for(int i = 0; i < NumDoctors; i++) {
cout << i+1 << ": " << doctors[i].GetName() << endl; // what is type? what needed?
}
do {
cin >> n;
n = n - 1; // adjust to array indices
cin.ignore(255,'\n');
} while((n < 0) || (n > NumDoctors)); 
return n;
}
void Scheduler::ChooseTimeSlot( Doctor & D,const Name & patient )
{
int time;
cout << '\n'
<< "Daily Schedule of Dr. " << D.GetName() << '\n'
<< "........................................" << '\n'
<< D.GetSchedule() << '\n';
do {
cout << "Enter a time (format hh:mm): ";
time = GetTime(cin);
} while(!D.AddToSchedule(patient,time));
}
class Scheduler {
public:
Scheduler( Doctor * docs, int NumDoctors);
void PrintAllAppointments( const char * fileName );
bool ScheduleOneAppointment();
void ScheduleAllAppointments();
private:
Doctor * doctors; // points to first element in array of doctors
int NumDoctors; // keeps size of array of Doctors
int ChooseDoctor() const;
void ChooseTimeSlot(Doctor & theDoc, const Name & patient)const;
};