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Code :
//Project Program for Hospital Database Queue array.
#include
#include
#include
#include
// define maximum number of patients in a queue
#define MAXPATIENTS 100
// define structure for patient data
struct patient
{
char FirstName[50];
char LastName[50];
char ID[20];
};
// define class for queue
class queue
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{
public:
queue (void);
int AddPatientAtEnd (patient p);
int AddPatientAtBeginning (patient p);
patient GetNextPatient (void);
int RemoveDeadPatient (patient * p);
void OutputList (void);
char DepartmentName[50];
private:
int NumberOfPatients;
patient List[MAXPATIENTS];
};
// declare member functions for queue
queue::queue ()
{
// constructor
NumberOfPatients = 0;
}
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int queue::AddPatientAtEnd (patient p)
{
// adds a normal patient to the end of the queue.
// returns 1 if successful, 0 if queue is full.
if (NumberOfPatients >= MAXPATIENTS)
{
// queue is full
return 0;
}
// put in new patient
else
List[NumberOfPatients] = p; NumberOfPatients++;
return 1;
}
int queue::AddPatientAtBeginning (patient p)
{
// adds a critically ill patient to the beginning of the queue.
// returns 1 if successful, 0 if queue is full.
int i;
if (NumberOfPatients >= MAXPATIENTS)
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{
// queue is full
return 0;
}
// move all patients one position back in queue
for (i = NumberOfPatients-1; i >= 0; i--)
{
List[i+1] = List[i];
}
// put in new patient
List[0] = p; NumberOfPatients++;
return 1;
}
patient queue::GetNextPatient (void)
{
// gets the patient that is first in the queue.
// returns patient with no ID if queue is empty
int i; patient p;
if (NumberOfPatients == 0) {
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// queue is empty
strcpy(p.ID,"");
return p;}
// get first patient
p = List[0];
// move all remaining patients one position forward in queue
NumberOfPatients--;
for (i=0; i
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{
if (stricmp(List[i].ID, p->ID) == 0)
{
// patient found in queue
*p = List[i]; found = 1;
// move all following patients one position forward in queue
NumberOfPatients--;
for (j=i; j
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cout
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cout
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void OutputPatient (patient * p)
{
// this function outputs patient data to the screen
if (p == NULL || p->ID[0]==0)
{
cout
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Social security number: " ID;
}
int ReadNumber()
{
// this function reads an integer number from the keyboard.
// it is used because input with cin >> doesn't work properly!
char buffer[20];
cin.getline(buffer, sizeof(buffer));
return atoi(buffer);
}
void DepartmentMenu (queue * q)
{
// this function defines the user interface with menu for one
department
int choice = 0, success; patient p;
while (choice != 6)
{
// clear screen
clrscr();
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// print menu
cout
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choice = ReadNumber();
// do indicated action
switch (choice)
{
case 1: // Add normal patient
p = InputPatient();
if (p.ID[0])
{
success = q->AddPatientAtEnd(p);
clrscr();
if (success)
{
cout
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Error: The queue is full. Cannot add patient:";
}
OutputPatient(&p);
cout AddPatientAtBeginning(p);
clrscr();
if (success)
{
cout
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else
{
// error
cout GetNextPatient();
clrscr();
if (p.ID[0])
{
cout
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Patient to operate:
";
OutputPatient(&p);}
else
{
cout RemoveDeadPatient(&p);
clrscr();
if (success)
{
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cout
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clrscr();
q->OutputList();
cout
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{
// clear screen
clrscr();
// print menu
cout
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// is it a department name?
if (MenuChoice >= 1 && MenuChoice
