STACK SEGMENT STACK
DB 100 DUP(?)
STACK ENDS
CODE SEGMENT
ASSUME CS:CODE,SS:STACK
START: MOV AH,01H
INT 21H
CMP AL,97
JGE P1
CMP AL,121
JNG P1
JMP EXIT
P1: SUB AL,20H
EXIT:
MOV DL,AL
MOV AH,02H
INT 21H
MOV AH,4CH
INT 21H
CODE ENDS
END START
帮我改改吧
输入小写的话,输出大写的,如果输入其他的话,就不变