Question

编写程序，从键盘接收一个小写字母，然后找出它的前导字符和后续字符，再按顺序显示这三个字符.(汇编语言

Answer 1

.model small
.386
.code
MAIN PROC FAR
start:
push ds
sub ax,ax
push ax
input:
mov ah,7H
int 21H
cmpe:
cmp al,20H
JE exit
cmp al,61H
JL input
cmp al,7AH
JG input
print:
sub al,01H
mov dl,al
mov ah,02H
int 21H
add al,01H
mov dl,al
mov ah,02H
int 21H
add al,01H
mov dl,al
mov ah,02H
int 21H
;输出换行回车
mov dl,0AH
mov ah,02H
int 21H
jmp input
exit :
ret
MAIN ENDP
END start

Answer 2

clear
accept "请输入一个字符串：" to x
s=0
for i=1 to len(x)
k=substr(x,i,1)
if k="a" or k="A"
s=s+1
endif
enddo
?"其中字母a有：",s

Answer 3

遗憾哦

没有 汇编语言 环境