Mitul's Project

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

void information();
void book_room();

struct node
{
    char room_num[10];
    char name[30];
    char phone_number[15];
    char national_id[20];
    char day[10];
    struct node *next;
}*head = NULL;

void empty_room()
{

}

void room_type()
{

}

void book_room()
{
    FILE *fp, *f;
    int i,a,b,temp, system,num;
    char room[]=".txt";
    struct node *new_node, *current;

    while(1)
    {
        new_node = (struct node*)malloc(sizeof(struct node));
        new_node->next = NULL;



        printf("Enter your choice what you want to do:\n");
        printf("1 for searching empty room\n");
        printf("2 for types of room\n");
        printf("3 room booking\n");
        printf("4 for searching customer details\n");
        printf("5 for food service\n");
        printf("6 for billing system\n");
        printf("7 for check out\n");
        printf("\nEnter : ");
        scanf("%d", &system);
        if (system==3)
        {
            printf("Enter the room no : ");
            scanf(" %[^\n]", new_node->room_num);
            strcat(new_node->room_num, room);

            fp = fopen(new_node->room_num, "w");
            if(fp == NULL){
                perror("This room is already booked");
                return EXIT_FAILURE;
            }
            else{
                printf("Enter your name : ");
                getchar();
                fprintf(fp, gets(new_node->name));
                fprintf(fp, "\n");
                printf("Enter your mobile no : ");
                fprintf(fp, gets(new_node->phone_number));
                fprintf(fp, "\n");
                printf("Enter national id no : ");
                fprintf(fp, gets(new_node->national_id));
                fprintf(fp, "\n");
                printf("How many days you want to stay here : ");
               fprintf(fp, gets(new_node->day));
                fprintf(fp, "\n");
                fclose(fp);

                if(head == NULL){
                    head = new_node;
                    current = new_node;
                }
                else{
                    current->next = new_node;
                    current = new_node;
                }
            }
            printf("\nThanks for staying us, Your room is booked successfully :-)\n");
        }
        else if (system==2)
        {
            room_type();
        }

        else if (system==4)
        {
            //customer_details();
            information();
        }

        else if (system==5)
        {
            food_service();
        }

        else if (system==6)
        {
            billing();
        }

        else if (system==6)
        {
            check_out();
        }

        else
        {
            printf("Wrong choice. Please insert a correct value\n\n\n");
        }

    }

}

void customer_details()
{

}

void food_service()
{

}

void billing()
{

}

void check_out()
{

}

void information()
{
    FILE *fp;
    char ch;
    struct node *current;

    current = head;

    while(current != NULL){
        printf("%s\n", current->room_num);
        fp = fopen(current->room_num, "r");

        while(1){
            ch = fgetc(fp);
            if(ch==EOF){
                break;
            }
            putchar(ch);
        }
        current = current->next;

    }
}

int main()
{
    printf("                                     Our Hotel Management System\n                                    <--------------------------->\n\n\n");

    book_room();
    information();

    return 0;
}