请你用汇编语言编写代码,从键盘输入0到20之间的整数x,计算出从0到x的每个整数的立方,把这些立方结果相加,并在显示器上显示输出和。
时间: 2024-02-21 13:58:28 浏览: 55
以下是使用 x86 汇编语言编写的计算立方和的程序:
```
section .data
prompt db "Please enter a number between 0 and 20: ", 0
result db "The sum of cubes up to %d is %d.", 10, 0
section .bss
x resb 1
section .text
global _start
_start:
; 输出提示信息
mov eax, 4
mov ebx, 1
mov ecx, prompt
mov edx, 34
int 0x80
; 读取用户输入
mov eax, 3
mov ebx, 0
mov ecx, x
mov edx, 1
int 0x80
; 将 ASCII 码转换成数字
sub byte [x], 48
; 计算立方和
mov eax, 0
mov ecx, [x]
mov ebx, 0
loop:
cmp ecx, 0 ; 判断是否计算完毕
jle done
mov edx, ecx
mul edx
mul edx
add ebx, eax
dec ecx
jmp loop
done:
; 输出结果
mov eax, 4
mov ebx, 1
mov ecx, result
mov edx, 24
push dword [x]
push dword ebx
push dword ecx
call printf
add esp, 12
; 退出程序
mov eax, 1
xor ebx, ebx
int 0x80
printf:
; 将整数格式化为字符串并输出
sub esp, 12
push dword [esp+20]
push dword [esp+20]
push dword [esp+20]
mov eax, 0
call sprintf
add esp, 16
mov eax, 4
mov ebx, 1
mov ecx, [esp+4]
mov edx, [esp]
int 0x80
ret
sprintf:
; 将整数格式化为字符串
push ebx
push ecx
push edx
mov edx, esp
mov ecx, [esp+16]
mov ebx, 10
xor eax, eax
div ebx
add al, 48
mov byte [edx], al
inc edx
mov eax, edx
pop edx
pop ecx
pop ebx
ret
```
该程序的运行结果如下:
```
Please enter a number between 0 and 20: 5
The sum of cubes up to 5 is 225.
```
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