微机课程设计报告(15)

jmp placef

placef: cmp al,'+' jz addf cmp al,'-' jz subf cmp al,'*' jz mulf cmp al,'/' jz divf cmp al,'c'

jz clrkey

addf:mov yunf,1

jmp ru

;置运算符完毕后返回输入

subf:mov yunf,2

jmp ru

mulf:mov yunf,3

jmp ru

divf:mov yunf ,4

jmp ru

clrkey:clear mov bh,0 mov dh,0 mov dl,0 mov ah,2