p94.asm

本程序是汇编语言的一些基本功能的组合

data segment
 x db 0
 y db ?
data ends
stack segment stack
 db 200 dup(0) 
stack ends
code segment
 assume ds:data,ss:stack,cs:code
start:
 mov ax,data
 mov ds,ax
 cmp x,0
 jge a1
 mov y,-1
 jmp exit
a1:
 jg a2
 mov y,0
 jmp exit
a2:
 mov y,1
exit:
 mov ah,4cH
 int 21h
code ends
 end start