三数相加
mov al,0
mov si,offset buf
add al,[si]
inc si
add al,[si]
mov sun,al
简化段定义结构
.model small
.data
buf db 35h,78h,0a5h
sum db ?
.code
mov ax,@data
mov ds,ax
mov al,0
mov si,offset buf
add al,[si]
inc si
add al,[si]
mov sun,al
mov ah,4ch
int 21
end