4.从键盘上输入一串以“$”为结束符的字符串,编写程序,统计该字符串中数字字符的个数,并将其统计结果

2025-03-29 12:47:16
推荐回答(1个)
回答1:

data segment
mess db 0dh,0ah,'输入数字个数为: $'
num db 0

data ends
code segment
assume cs:code, ds:data
main proc far
start:
push ds
xor ax,ax
push ax
mov ax,data
mov ds,ax
;-------------------------
next:
mov ah,01
int 21h
cmp al,'0'
jl NO_0_9
cmp al,'9'
jg NO_0_9
inc num
NO_0_9:
cmp al,'$'
jne next
mov ah,09
lea dx,mess
int 21h
xor ah,ah
mov al,num
mov bl,100d
div bl
push ax
add al,30h
mov dl,al
mov ah,2
int 21h
pop ax
mov al,ah
xor ah,ah
mov bl,10d
div bl
add ax,3030h
push ax
pop dx
mov ah,2
int 21h
mov dl,dh
int 21h

;-------------------------
ret

main endp
code ends
end start

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