ds_khush_12.c

#include <stdio.h>
#include <string.h>

#define MAX 5 // maximum number of patients

char queue[MAX][50]; // array of strings to store patient names
int front = -1, rear = -1;

// Function to add patient
void enqueue(char name[])
{
    if (rear == MAX - 1)
    {
        printf("\nQueue is full! No more patients can be added.\n");
        return;
    }
    if (front == -1)
        front = 0;
    rear++;
    strcpy(queue[rear], name);
    printf("Patient '%s' added to the queue.\n", name);
}

// Function to remove patient
void dequeue()
{
    if (front == -1 || front > rear)
    {
        printf("\nNo patients in the queue.\n");
        return;
    }
    printf("Patient '%s' is now seeing the doctor.\n", queue[front]);
    front++;
}

// Function to show next patient
void showNext()
{
    if (front == -1 || front > rear)
    {
        printf("\nNo patients waiting.\n");
        return;
    }
    printf("Next patient to see the doctor: %s\n", queue[front]);
}

// Function to display all patients
void displayQueue()
{
    if (front == -1 || front > rear)
    {
        printf("\nNo patients waiting.\n");
        return;
    }
    printf("\nPatients in queue:\n");
    for (int i = front; i <= rear; i++)
    {
        printf("%d. %s\n", i - front + 1, queue[i]);
    }
}

int main()
{
    int choice;
    char name[50];

    printf("🏥 Hospital Patient Management System 🏥\n");

    while (1)
    {
        printf("\n1. Add Patient\n2. Serve Patient\n3. Show Next Patient\n4. Display All Patients\n5. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);
        getchar(); // to clear newline

        switch (choice)
        {
        case 1:
            printf("Enter patient name: ");
            gets(name);
            enqueue(name);
            break;
        case 2:
            dequeue();
            break;
        case 3:
            showNext();
            break;
        case 4:
            displayQueue();
            break;
        case 5:
            printf("Exiting... Stay healthy!\n");
            return 0;
        default:
            printf("Invalid choice! Try again.\n");
        }
    }
}