Using x86 assembly language

Sample Program

Here is a sample program. The player 1's input is printed in red . Player 2's input is displayed in blue

.

Welcome to Mystery Word!

Player 1, enter a word: orville

Screen is cleared

Your secret word: -------

Guess a letter:l

Your secret word: ----ll-

Guess a letter:o

Your secret word: o---ll-

Guess a letter:s

Your secret word: o---ll-

Guess a letter:r

Your secret word: or--ll-

Guess a letter:v

Your secret word: orv-ll-

Guess a letter:t

Your secret word: orv-ll-

Guess a letter:e

Your secret word: orv-lle

Guess a letter:i

Your secret word: orville

Congrats! You guessed the secret word!

Reading and Storing Text

To read text from the keyboard, please read about the ScanCString subroutine in the CSC35 Library. You will need to create a buffer large enough to hold the phrase.

The example below creates a buffer (space) of 30 characters.

My Buffer:

.space 30

Requirements

1. Display the title (of your choice)

2. Read the word from the keyboard

3. Clear the screen

4. Loop until all letters are guessed

5. Print the display string (with the missing characters) each time in the loop

6. When they are correct, display message congratulating them

7. Proper formatting. Labels are not indented. All instructions are indented the same

Pseudocode

The following is the basic logic of the game in Visual Basic-like pseudocode.

Print your program's name

Scan the answer from the keyboard.

Implement a For Loop to fill a buffer for the display

string with the correct number of dashes.

Do

Input a guess letter

Loop through each letter of the answer

If the answer[n] ==guess letter

display[n] =guess letter

#This uncovers the letter

end if

end loop

Print the display string (the one with dashes) loop while no dashes exist in the display (this will require another loop)

and the sub routines are

MISCellaneouS Subroutines Subroutine Input Output Notes PrintAbout none none Prints information about this library EndProgram Terminates your program. You must call this subroutine at the end of your program none none PrintRegisters none none Prints the contents of the register file to the screen String Subroutines Subroutine Input Output Notes PrintcString rax none Prints a null-terminated string stored in the address Scancstring Scans a null-terminated string and stores it into the address %rax. The register %rbx must contain the maximum number of characters that can be read (the size of the buffer) rax, rbx none LengthCstring Returns the length of a null-terminated string stored at address %rax. The result is returned in %rax rax rax PrintChar Prints the ASCII character stored in %al to the screen none