问题描述：
阅读下列程序,说明程序的功能
MOV A,40H
CJNE A,41H,NEQU
MOV 42H,40H
SJMP TOOFF
NEQU:JC SUB
MOV 42H,40H
SJMP TOOFF
SUB:MOV 42H,41H
TOOFF:RET
MOV A,40H
CJNE A,41H,NEQU
MOV 42H,40H
SJMP TOOFF
NEQU:JC SUB
MOV 42H,40H
SJMP TOOFF
SUB:MOV 42H,41H
TOOFF:RET
问题解答：
我来补答展开全文阅读