I need help with my program. It not display anything each time I$\text{'}$m running it though marie program. Here is the assignment: Using the MARIE computer assembly language, write a program that computes the following expression:

zlarr$(a^{**}(b))+(c**d).$ The computer will read in the input values $a,b,c,$ and $d$ from the keyboard, the final

result $(z$ has to be displayed. In addition, every time an input value is read in$,$ it must be validated by

checking that the input is a positive number. If it is positive display the number on the screen; otherwise

display zero and end the program. Remember that the MARIE instruction set does not have an instruction

to execute multiplication. The program must be tested in the MARIE simulator.

My Program:

ORG $100$

InputA, DEC $0$

InputB, DEC $0$

InputC, DEC $0$

InputD, DEC $0$

ResultZ, DEC $0$

Start, IN ; Input a

SKIPCOND $000$ ; Check if input is positive

JUMP InputError ; Jump to InputError if input is not positive

STORE InputA ; Store input in InputA

OUT ; Display the input

IN ; Input b

SKIPCOND $000$ ; Check if input is positive

JUMP InputError ; Jump to InputError if input is not positive

STORE InputB ; Store input in InputB

OUT ; Display the input

IN ; Input c

SKIPCOND $000$ ; Check if input is positive

JUMP InputError ; Jump to InputError if input is not positive

STORE InputC ; Store input in InputC

OUT ; Display the input

IN ; Input d

SKIPCOND $000$ ; Check if input is positive

JUMP InputError ; Jump to InputError if input is not positive

STORE InputD ; Store input in InputD

OUT ; Display the input

LOAD InputA ; Load InputA into accumulator

MUL InputB ; Multiply accumulator with InputB

STORE ResultZ ; Store result of first multiplication in ResultZ

LOAD InputC ; Load InputC into accumulator

MUL InputD ; Multiply accumulator with InputD

ADD ResultZ ; Add result of second multiplication to ResultZ

STORE ResultZ ; Store final result in ResultZ

OUT ; Display the final result

HLT ; Halt the program

InputError, LDA Zero ; Load $0$ into accumulator

OUT ; Display $0$

HLT ; Halt the program

Zero, DEC $0$

END