Appointment Scheduler Program

Overview

The C-program is designed to manage a list of appointments. It offers the following functionalities:

• Display all appointments for the current day.
• Display all appointments for a specific day, as entered by the user.
• Show the entire list of appointments.
• Add a new appointment.
• Search for an appointment in the list.
• Delete an appointment from the list.
• Delete the entire list of appointments.
• Exit the program.

The list of appointments is saved to a file before the program is closed. Upon starting the program, this file is read, and any past appointments are automatically deleted. Subsequently, all appointments for the current day are displayed.

Implementation Details

• Appointments are stored using a C-structure named Appointment.
• Appointments are stored in a linked list sorted by their time.
• Two C-structures, Element and List, are used to store the linked list.
• Several C-functions are implemented to manage and display the linked list, such as createList, clearList, insertElement, findElement, deleteElement, printAppointment, and printList.
• A menu function displays eight menu options and reads input from the console.
• The main function reads the file and saves it in a linked list. Expired appointments are omitted. If the filename is not provided as a command-line argument, "termine.txt" is used by default.

Usage Instructions

1. Compile the program using the GCC-Compiler with the options -Wall and -pedantic-errors.

    gcc -Wall -pedantic-errors -o scheduler.out  scheduler.c

2. Run the program. If you have a specific file you want to use, provide it as a command-line argument. If not, the program will default to using "termine.txt".
3. Use the menu to interact with the program and manage your appointments.