汇编语言实现在BUFFERI 开始的区域中存放着不超过10字节的字符串, 在BUFFER2 开始的区域中存放着不超过 10字节的字符串(两个字符串均需要手动输入),将既在 BUFFERI 中又在 BUFFER2中出现的字符输出到屏幕上,完整代码
时间: 2024-11-04 13:16:12 浏览: 15
在汇编语言中编写这样的程序会涉及到内存操作、用户输入和字符串比较等步骤。以下是一个简单的x86汇编示例,假设我们使用Linux环境和GCC汇编器。这个例子在Intel x86体系架构下运行,它利用`scanf`函数获取用户输入,然后遍历两个缓冲区查找共同字符。
```assembly
section .data
BUFFERI db 'Enter a string in BUFFERI:', 0
BUFFERI_LEN equ $ - BUFFERI
BUFFER2 db 'Enter a string in BUFFER2:', 0
BUFFER2_LEN equ $ - BUFFER2
BUFFERI_area times 11 db 0 ; buffer for BUFFERI (10 bytes + null terminator)
BUFFER2_area times 11 db 0 ; buffer for BUFFER2 (10 bytes + null terminator)
section .text
global _start
_start:
; Prompt user and read input into BUFFERI
push INPUT_BUFFERI_len
push BUFFERI
call scanf
add esp, 8
; Prompt user and read input into BUFFER2
push INPUT_BUFFER2_len
push BUFFER2
call scanf
add esp, 8
; Compare strings
mov ecx, BUFFERI_area
mov edi, BUFFER2_area
mov ebx, 0 ; counter to check common characters
compare_loop:
lodsb ; load next byte from BUFFERI
cmpsb ; compare with next byte in BUFFER2
je found_common_char
je end_of_buffer_i
jnz continue_search
found_common_char:
inc ebx ; increment counter if same character
jmp continue_search
continue_search:
mov al, [ecx] ; save current char from BUFFERI
loop compare_loop ; repeat until end of BUFFERI or BUFFER2
; Display the common characters
display_loop:
cmp ebx, 0 ; check if any common characters found
je no_more_chars
mov dl, [edi] ; get the common character from BUFFER2
mov ah, 0x0E ; BIOS video output function
int 0x10 ; print character
dec ebx ; decrement counter
jmp display_loop
no_more_chars:
; Output ending message
lea eax, [BUFFERI area + BUFFERI_LEN]
push eax
call printf
lea eax, [BUFFER2 area + BUFFER2_LEN]
push eax
call printf
; Exit program
mov eax, 1 ; sys_exit syscall number
xor ebx, ebx ; exit status code
int 0x80 ; call kernel
; Helper functions (not shown here due to brevity)
INPUT_BUFFERI_len dd 10
INPUT_BUFFER2_len dd 10
```
注意:这是一个简化的版本,并未涵盖所有错误处理和边界检查。实际应用中,你需要完善代码以处理输入过长或无效的情况。此外,这里的`scanf`、`printf`和BIOS视频输出函数都是模拟的,真实环境下可能需要替换为相应的系统调用或者库函数。
阅读全文