Write a MARIE assembly program that accepts one integer inpu

Write a MARIE assembly program that accepts one integer input.

Use the the number to calculate N!

Print out the result.

Test with 5 !

-I do not know how to write MARIE Sim program that will allow me to calculate factorial number. Please do help.

Solution

DATA SEGMENT NUM DB ? FACT DB 1H RES DB 10 DUP (\'$\') MSG1 DB \"ENTER NUMBER : $\" MSG2 DB 10,13,\"RESULT : $\" DATA ENDS CODE SEGMENT ASSUME DS:DATA,CS:CODE START: MOV AX,DATA MOV DS,AX LEA DX,MSG1 MOV AH,9 INT 21H MOV AH,1 INT 21H SUB AL,30H MOV NUM,AL MOV AH,0 MOV AL,FACT MOV CH,0 MOV CL,NUM LABEL1: MUL CL LOOP LABEL1 LEA SI,RES CALL HEX2DEC LEA DX,MSG2 MOV AH,9 INT 21H LEA DX,RES MOV AH,9 INT 21H MOV AH,4CH INT 21H CODE ENDS HEX2DEC PROC NEAR MOV CX,0 MOV BX,10 LOOP1: MOV DX,0 DIV BX ADD DL,30H PUSH DX INC CX CMP AX,9 JG LOOP1 ADD AL,30H MOV [SI],AL LOOP2: POP AX INC SI MOV [SI],AL LOOP LOOP2 RET HEX2DEC ENDP END START