data segment
ad1 db 8h
ad2 db 7h
sum db ?
data ends
code segment
assume cs:code,ds:data
main:
mov ax,data
mov ds,ax
mov al,ad1
mov bl,ad2
cmp al,bl
jnc next2
jc next1
next1: xchg al,bl
next2: add al,30h
mov dl, al
mov ah, 2
int 21h
mov ah,4Ch;终止当前程序并返回调用程序
int 21h
code ends
end main