Question

Implement a while loop counter in Marie

1) Get a number from the user greater than zero

2) Use the number as loop limit; while loop

3) Display counter value

4) Increment loop counter variable, i by 2

Answer 1

Here is your code for the above problem in MARIE Assembly language. I am also providing the screenshot of my handwritten solution, in case you need to know how the program is working(I have provided comments for every step for better understanding, so I recommend to please refer to that also. In case, if you have any doubts regarding any step, please tell me in the comments, I would love to help.

INPUT
STORE X
STORE i
WHILE, LOAD X
SUBT i
SKIPCOND 800
JUMP DO
JUMP ENDWHILE
DO, LOAD i
OUTPUT
ADD TWO
STORE i
JUMP WHILE
ENDWHILE, HALT
X, DEC=0
i, DEC=0
TWO, DEC=2

INPUT STORE X 1 Getting input from us STORE II į is Counter variable WHILE LOAD X 'll loading x to AC or "Accumulator SUBT : Il Compare X to i SKIPCOND 800 // It X is greater than isi.e- ACTO JUMP DO then condinue loop JUMP END WHUE !! Eise terminate while loop DO . LOAD E Il load counter in AC OUTPUT. 11 Prints Counter Value ADD TWO " Adds a to counter variable i STORE í ll store that value to i JUMP WHILE END WHILE HALT I End while loop X , DEC o f Declaring i ; DEL " all variabies! THO DEL 2 using above