用汇编语言写一个程序,它先接收一个字符串,然后显示其中数字符的个数、英文字母的
时间: 2024-02-11 08:04:10 浏览: 153
个数以及其他字符的个数。
以下是汇编语言程序的代码:
```
section .data
prompt db "Please enter a string: ", 0
str_buffer db 100
digits db "0123456789"
letters db "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
digits_count db 0
letters_count db 0
others_count db 0
section .text
global _start
_start:
; display prompt
mov eax, 4
mov ebx, 1
mov ecx, prompt
mov edx, 21
int 0x80
; read string from input
mov eax, 3
mov ebx, 0
mov ecx, str_buffer
mov edx, 100
int 0x80
; loop through string and count characters
mov ecx, str_buffer
mov ebx, digits
xor eax, eax
xor edx, edx
; count digits
digits_loop:
cmp byte [ecx], 0
je count_done
mov al, byte [ecx]
mov edi, ebx
repne scasb
jz digits_found
inc ecx
jmp digits_loop
digits_found:
inc digits_count
jmp digits_loop
; count letters
letters_loop:
cmp byte [ecx], 0
je count_done
mov al, byte [ecx]
mov edi, letters
repne scasb
jz letters_found
inc ecx
jmp letters_loop
letters_found:
inc letters_count
jmp letters_loop
; count other characters
others_loop:
cmp byte [ecx], 0
je count_done
mov al, byte [ecx]
cmp al, 32
jl others_found
cmp al, 126
jg others_found
inc ecx
jmp others_loop
others_found:
inc others_count
jmp others_loop
; display character counts
count_done:
mov eax, 4
mov ebx, 1
; display digits count
mov ecx, digits_count
add cl, '0'
mov dl, ' '
int 0x80
; display letters count
mov ecx, letters_count
add cl, '0'
mov dl, ' '
int 0x80
; display others count
mov ecx, others_count
add cl, '0'
mov dl, ' '
int 0x80
; display new line
mov eax, 4
mov ebx, 1
mov ecx, newline
mov edx, 1
int 0x80
; exit program
mov eax, 1
xor ebx, ebx
int 0x80
section .bss
newline resb 1
```
这个程序通过读取用户输入的字符串,并循环计算字符串中每个字符的类型,最终输出数字字符的个数、英文字母的个数和其他字符的个数。
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