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I got it to where I can display the number inputted. The code i have thus far will give me this. But, I need to add to it in order to verify that the number entered is between 1-8, and for what number 1-8 is entered, produces the factorial of that number. I am at a loss here. HELP! The following is what I have:
Prompt db 'Enter a number 1-8: $'
msg2 db 10, 10, 13, 'Factorial is: $'
mov ax, @data
mov dx,offset prompt
mov ah, 01h; get character input
mov ah, 0
sub ax, 30h; make it a number from ASCII char
call div10; proc to create the base 10
mov dx, offset msg2
mov ah,4ch;send return to dos code
mov dx, 0
mov bx, 10
add cx, 1
cmp ax, 0
add dl, 30h
mov ah, 02h
ret; return after the call