Welcome to the Restaurant Permissions Project! This C language project provides practical experience with bitwise operators, memory management, string handling, and file I/O in the context of a restaurant management system. The primary focus is on bitwise operations, enabling efficient user permission management through compact bit flags.
To start with the project:
- Ensure you have a C compiler installed (you can use any C compiler). Check by running
gcc -v. - Compile the project using
gcc main.c restaurant_permissions.c -o a.out. - Execute the generated output file.
Explore the code to understand the implementation of bitwise operations, memory management, string handling, and file I/O within a restaurant management system. The project provides hands-on experience and practical knowledge in these essential areas of C programming.
This project makes extensive use of fundamental bitwise operators, including AND (&), OR (|), XOR (^), and left shift (<<), to manipulate individual bits efficiently. These operators are pivotal in representing and managing various permissions within the system.
Used to check the presence of specific permissions.
Employed for adding or granting new permissions.
Implemented for toggling or removing permissions. Additionally, XOR is utilized for encryption and decryption, providing a secure and efficient method to handle sensitive information. The XOR operator is applied through bitwise operations to ensure robust string encryption and decryption.
This operator is utilized for left-shifting bits, effectively multiplying the value by 2 raised to the power of the shift count. In the context of permissions, left shift is often used to assign distinct bit positions to different permission types, creating a binary representation where each bit corresponds to a specific permission. For example, 1 << 3 results in the binary value 00001000, assigning the fourth bit for a particular permission.
Dive into memory management practices, including dynamic memory allocation and deallocation. Learn to use malloc and free for efficient handling of user names and structs, preventing memory leaks.
Explore robust string handling techniques, emphasizing the use of functions like strcpy for managing and manipulating user names. In this project, dynamic memory allocation is employed when reading user names from a file, considering the string length property. Similarly, when adding a new user, memory is dynamically allocated to store the user's name. This ensures efficient memory usage and adaptability to varying string lengths in the C language.
Learn effective ways to work with strings, incorporating dynamic memory allocation for user names when reading from files and when adding new users.
Understand file input and output operations for reading from and writing to files. Learn how to store user data persistently, enabling information retrieval between program executions.
This project makes use of modular programming by employing header files to organize and encapsulate related functionality. Various aspects of the project, such as user management, permissions, and roles, are encapsulated in separate header files (headers folder). These header files serve as helpers, providing clear interfaces and aiding in code organization.
Explore the contents of these header files to understand how they facilitate modularity, encapsulation, and code reuse. Header files play a crucial role in making the codebase more maintainable and understandable, promoting a modular design approach.
Happy coding!