This program manages user data using NASM for 32-bit architecture. Follow the steps below to compile and link the assembly code (project.asm):

• Open a command prompt or terminal and navigate to the directory containing project.asm.
• Run the following commands:

  nasm -f elf32 -g -F dwarf project.asm -o project.o
  ld -m elf_i386 project.o -o executable
  

• Explanation:
  • nasm: NASM assembler command.
  • -f elf32: Specifies 32-bit ELF architecture.
  • -g: Includes debugging symbols in the object file.
  • -F dwarf: Specifies DWARF debugging information format.
  • project.asm: Input assembly code file.
  • -o project.o: Output filename for the object file.
  • ld: Linker command.
  • -m elf_i386: Specifies 32-bit Intel x86 architecture.
  • project.o: Object file created by NASM.
  • -o executable: Output filename for the final executable file.

1. Initial Setup:

   • layout asm: Sets the GDB display layout to show assembly code alongside other information.
   • layout regs: Displays the register values in the layout.
   • set disassembly-flavor intel: Specifies that you want to disassemble the code in Intel syntax (common for x86 architecture).

2. Loading the Program:

   • file executable: Loads the executable file (generated by NASM) into GDB for debugging.

3. Debugging Commands:

   • step: Executes the next instruction in the program, stepping through line by line.
   • break [line]: Sets a breakpoint at the specified line number in the assembly code. Execution will pause when it reaches that line.
   • delete [breakpoint_number]: Removes the breakpoint with the given number.
   • info breakpoint: Lists all currently set breakpoints and their information.
   • print (casting)[variable-name]: Prints the value of a variable after potentially casting it to a specific data type. Casting ensures GDB interprets the value correctly.
   • display (casting)[variable-name]: Continuously displays the value of a variable and updates it as the program executes. Casting is again helpful for proper interpretation.

Upon running project.asm, you'll encounter a menu with the following options:

1. Create User
2. Display All Users
3. Display User by ID
4. Display Youngest User
5. Quit

Input Requirements:

• Enter a number between 1 and 5 corresponding to your desired action.
• Any other input will trigger an "Invalid Input" message.

Specific Actions:

• Create User: Enter the user's name and age separated by a space.
• Display All Users: View all created users.
• Display User by ID: Enter the user's ID to display their details.
• Display Youngest User: View the youngest user's details.
• Quit: Exit the program.

Exceptions:

• The program handles invalid input and user data scenarios with appropriate error messages.

• User data is stored in two string arrays: name_array and age_array.
• User IDs are implicit and determined by the position within the arrays.
• Main loop manages user actions and displays the menu.
• User actions include creating users, displaying user information, and quitting.