ex3_10.asm

data segment
	err		db	'ERROR','$'
data ends

stack1	segment para stack
			dw	10h		dup(0)
stack1 ends

codeseg	segment
start:
	assume cs:codeseg, ds:data, ss:stack1
	mov		ax,		data
	mov		ds,		ax

	mov		ah,		01h
	int		21h
	sub		al,		30h
	cmp		al,		9
	jg error
	xor		ch,		ch
	mov		cl,		al
	jcxz done
	mov		dl,		'?'
	mov		ah,		02h
print:
	int 21h
	loop print
done:
	mov		ah,		4ch
	int 21h

error:
	mov		dx,		offset err
	mov		ah,		09h
	int 21h
	jmp done

codeseg ends
	end start