Write a program that will prompt the user to enter a hex digit character and display it on the next line in decimal
#. Write a program that will prompt the user to enter a hex digit character ("0"· ... "9" or "A" ... "F"), display it on the next line in decimal, and ask the user i.i he or she wants to do it again. If the user types "y" or "Y", the ·program repeats; If the user types anything else, the program terminates. If the user enters an illegal character, prompt the user to try again.
Solution:
.stack 100h
.data
msg1 db 10,13,'ENTER A HEX DIGIT:$'
msg2 db 10,13,'IN DECIMAL IS IT:$'
msg3 db 10,13,'DO YOU WANT TO DO IT AGAIN y/n?$'
msg4 db 10,13,'ILLEGAL CHARACTER- ENTER 0-9 OR A-F:$'
.code
again:
mov ax,@data
mov ds,ax
lea dx,msg1
mov ah,9
int 21h
mov ah,1
int 21h
mov bl,al
jmp go
go:
cmp bl,'9'
ja hex
jb num
je num
hex:
cmp bl,'F'
ja illegal
lea dx,msg2
mov ah,9
int 21h
mov dl,49d
mov ah,2
int 21h
sub bl,17d
mov dl,bl
mov ah,2
int 21h
jmp inp
inp:
lea dx,msg3
mov ah,9
int 21h
mov ah,1
int 21h
mov cl,al
cmp cl,'y'
je again
cmp cl,'Y'
je again
jmp exit
num:
cmp bl,'0'
jb illegal
lea dx,msg2
mov ah,9
int 21h
mov dl,bl
mov ah,2
int 21h
jmp inp
illegal:
lea dx,msg4
mov ah,9
int 21h
mov ah,1
int 21h
mov bl,al
jmp go
exit:
mov ah,4ch
int 21h
Output:
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