DSEG segment
DSEG ends
CSEG segment
main proc far
assume cs:cseg,ds:dseg
start:
MOV AH,01H
INT 21H
CMP AL,'a'
JB STOP
CMP AL,'z'
JA STOP
SUB AL,20H
MOV DL,AL
MOV AH,02H
INT 21H
JMP start ;忘记加jmp语句,结果出错,循环直到非字母跳出该循环!
STOP:
RET
main endp
cseg ends
end start
编写键盘输入小写字母用大写字母显示出来!
最新推荐文章于 2022-04-12 12:07:10 发布