Hospital Management System in C

#include <stdio.h>
#include <stdlib.h>

// Structure to represent patient information
struct Patient {
    int id;
    char name[50];
    int age;
};

// Function to add a new patient record to the file
void addPatientRecord(FILE *file) {
    struct Patient patient;
    printf("Enter patient ID: ");
    scanf("%d", &patient.id);
    printf("Enter patient name: ");
    scanf("%s", patient.name);
    printf("Enter patient age: ");
    scanf("%d", &patient.age);

    // Write the patient record to the file
    fwrite(&patient, sizeof(struct Patient), 1, file);
    printf("Patient record added successfully.\n");
}

// Function to display all patient records from the file
void displayPatientRecords(FILE *file) {
    struct Patient patient;

    // Read and display each patient record from the file
    rewind(file); // Move the file pointer to the beginning
    printf("Patient Records:\n");
    while (fread(&patient, sizeof(struct Patient), 1, file) == 1) {
        printf("ID: %d, Name: %s, Age: %d\n", patient.id, patient.name, patient.age);
    }
}

int main() {
    FILE *file;
    file = fopen("patient_records.dat", "ab+");

    if (file == NULL) {
        perror("Error opening the file");
        return 1;
    }

    int choice;
    do {
        printf("\nHospital Management System\n");
        printf("1. Add Patient Record\n");
        printf("2. Display Patient Records\n");
        printf("3. Exit\n");
        printf("Enter your choice: ");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addPatientRecord(file);
                break;
            case 2:
                displayPatientRecords(file);
                break;
            case 3:
                printf("Exiting the program.\n");
                break;
            default:
                printf("Invalid choice. Please try again.\n");
        }
    } while (choice != 3);

    fclose(file);
    return 0;
}