Airlines Reservation System in C Language

 

Airlines Reservation System in C Language

Airlines Reservation System deals with the various activities related to the flights.It is a web-based flight booking agency that is used to conduct flight bookings.Earlier all activities were done manually, which was very time-consuming and costly. But the Airlines Reservation System simplifies the booking process and is helpful for both travel agencies and travelers.

This project is designed in a way that includes faster system accuracy, and reliability, and makes it more informative.

Code:

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



struct curiousprogrammer_airlines// struct keyword is used to create a structure

{

   char passport[20];

   char name[20];

   char origin[20];//starting place of journey

   char destination[20];//place where we want to reach

   char email[20];

   int seat_num;

   struct curiousprogrammer_airlines *following;

}

*begin , *stream;

struct curiousprogrammer_airlines *dummy;

void main()

{

   void reserve(int r), cancel(),display(),savefile();//declaration of functions

   int choice;

   begin=stream=NULL;//initialize the struct pointers to NULL

   int num=1;

   do//starting of do while loop

   {

      printf("\n\n\t\t ************************************************");

      printf("\n\t\t    WELCOME TO CURIOUS PROGRAMMER'S AIRLINES RESERVATION SYSTEM     ");

      printf("\n\t\t ************************************************");

      printf("\n\n\n\t\t  Please enter your choice from below (1-4):");

      printf("\n\n\t\t 1. RESERVATION");

      printf("\n\n\t\t 2. CANCEL");

      printf("\n\n\t\t 3. DISPLAY");

      printf("\n\n\t\t 4. SAVE FILE");

      printf("\n\n\t\t 5. THANK YOU FOR CHOOSING CURIOUS PROGRAMMER'S AIRLINES RESERVATION SYSTEM");

      printf("\n\n\t\t 6. ENTER YOUR CHOICE:");





      scanf("%d",&choice);

      fflush(stdin);

      system("cls");//if you are writing code in linux or mac use clear in place of cls

      switch(choice)

      {

      case 1:

              reserve(num);

              num++;

              break;

      case 2:

              cancel();

              break;

      case 3:

              display();

              break;

      case 4:

              savefile();

              break;



      default:

              printf("\t INVALID CHOICE");

              printf("\t KINDLY ENTER CHOICE FROM NO.1-4");

      }

      getch();

   }

   while (choice =4);

}

void details()//following are the details that you have to enter

{

printf("\t Enter your passport number:");

gets(stream->passport); fflush(stdin);   //reads a line from stdin and stores it into the string pointed

printf("\t Enter your  name:");

gets(stream->name); fflush(stdin);

printf("\t Enter your email address:");

gets(stream->email); fflush(stdin);

    printf("\n\t Enter the Destination : ");

    gets(stream->destination); fflush(stdin);

}

void details();

void reserve(int r)

{

stream = begin;

if (begin == NULL)

{

// first traveller

begin = stream = (struct curiousprogrammer_airlines*)malloc(sizeof(struct curiousprogrammer_airlines));

details();

stream->following = NULL;

printf("\n\t SEAT BOOKING SUCCESSFULL!");

printf("\n\n\t your seat number is: Seat A-%d", r);

stream->seat_num = r;

return;

}

else if (r > 20) // FULL SEATS

{

printf("\n\t\t Seats Full.");

return;

}

else

{

// next traveller

while (stream->following)

stream = stream->following;

stream->following = (struct curiousprogrammer_airline *)malloc(sizeof(struct curiousprogrammer_airlines));

stream = stream->following;

details();

stream->following = NULL;

printf("\n\t Seat booking succesful!");

printf("\n\t your seat number is: Seat A-%d", r);

stream->seat_num = r;

return;

}

}

void savefile()

{

FILE *fpointer = fopen("curiousprogrammer records", "w");

if (!fpointer)

{

printf("\n Error in opening file!");

return;

Sleep(800);

}

stream = begin;

while (stream)

{

fprintf(fpointer, "%-6s", stream->passport);

fprintf(fpointer, "%-15s", stream->name);

fprintf(fpointer, "%-15s", stream->email);

        fprintf(fpointer, "%-15s", stream->destination);

        fprintf(fpointer, "\n");

stream = stream->following;

}

printf("\n\n\t Details have been saved to a file (curiousprogrammer records)");

fclose(fpointer);

}

void display()

{

stream = begin;

while (stream)

{

printf("\n\n Passport Number : %-6s", stream->passport);

printf("\n         name : %-15s", stream->name);

printf("\n      email address: %-15s", stream->email);

printf("\n      Seat number: A-%d", stream->seat_num);

        printf("\n     Destination:%-15s", stream->destination);

printf("\n\n****=====================================================****");

stream = stream->following;

}



}

void cancel()

{

stream = begin;

system("cls");

char passport[6];

printf("\n\n Enter passort number to delete record?:");

gets(passport); fflush(stdin);

if (strcmp(begin->passport, passport) == 0)

{

dummy = begin;

begin = begin->following;

free(dummy);

printf(" booking has been deleted");

Sleep(800);

return;



}



while (stream->following)

{

if (strcmp(stream->following->passport, passport) == 0)

{

dummy = stream->following;

stream->following = stream->following->following;

free(dummy);

printf("has been deleted ");

getch();

Sleep(800);

return;

}

stream = stream->following;

}

printf("passport number is wrong please check your passport");

}

Explanation:

1. All the required header files are used. As getch() function is used in our code and it is a pre-defined non-standard function that is defined in conio.h header file.

2. Arrays are used for saving the data that the user will input like passport [20], and name [20].

3. do-while loop is used so that it will execute the code block once, before checking the condition is true and then it will repeat the loop as the user require.

4. Switch case is used to handle the cases according to the user’s choice.

5. As users will reserve the seats it decreases the availability of seats by one.

6. Finally the project is ready to serve the Airline Reservation System.

Output: