汇编语言给定一条最长边,求所有可能的毕达哥拉斯三角形.要求:一个毕达哥拉斯三角形的三条边是由三个正整数A、B和C组成,从而A2+B2=C2。例如,数字3、4、5,由于9+16=25,而形成一个毕达哥拉斯三角形。写一段完整的汇编程序,实现输入一个值给C,然后显示值为C时,所有可能的毕达哥拉斯三角形。例如,如果输入5作为C的值,那么输出可以是
时间: 2023-11-14 22:06:36 浏览: 86
求毕达哥拉斯三角形的边
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下面是一段 x86-64 汇编代码,它实现了上述要求:
```asm
section .data
msg db "Enter the value of C: ", 0
format db "%d", 0
newline db 10, 0
result db "The possible Pythagorean triplets for C = %d are:", 0
triplet db "%d, %d, %d", 10, 0
section .bss
c resd 1
a resd 1
b resd 1
section .text
global main
main:
; Prompt the user to enter the value of C
mov edx, len(msg)
mov ecx, msg
mov ebx, 1
mov eax, 4
int 0x80
; Read in the value of C
mov edx, 1
mov ecx, c
mov ebx, 0
mov eax, 3
int 0x80
sub dword [c], '0'
; Initialize A and B to 1
mov dword [a], 1
mov dword [b], 1
; Compute all possible Pythagorean triplets for C
mov esi, 0 ; index for A
mov edi, 0 ; index for B
mov ebp, 0 ; index for C
mov ecx, [c]
outer_loop:
; Compute A^2
mov eax, [a]
imul eax
mov ecx, [c]
sub ecx, eax
jbe done ; A^2 is already greater than or equal to C
inner_loop:
; Compute B^2
mov ebx, [b]
imul ebx
cmp ebx, ecx
jbe next_b ; B^2 is too small
; Compute C^2
mov edx, [c]
imul edx
cmp eax, edx
jne next_b ; A^2 + B^2 is not equal to C^2
; Print the triplet
mov eax, 4 ; system call for writing to stdout
mov ebx, 1 ; file descriptor for stdout
mov edx, len(triplet)
mov ecx, triplet
int 0x80
push dword [a]
push dword [b]
push dword [c]
mov edx, format
mov ecx, esp
mov ebx, 1
mov eax, 4
int 0x80
add esp, 12 ; remove the triplet from the stack
next_b:
; Increment B
add dword [b], 1
inc edi
; Check if we have finished checking all possible values of B
cmp edi, ebp
jle inner_loop
; Increment A
add dword [a], 1
inc esi
; Reset B to 1
mov dword [b], 1
mov edi, 0
; Check if we have finished checking all possible values of A
cmp esi, ebp
jle outer_loop
done:
; Print a newline
mov eax, 4 ; system call for writing to stdout
mov ebx, 1 ; file descriptor for stdout
mov edx, len(newline)
mov ecx, newline
int 0x80
; Exit the program
mov eax, 1 ; system call for exit
xor ebx, ebx ; exit status code
int 0x80
```
这段代码使用 x86-64 汇编语言实现了输入一个值给 C,然后显示值为 C 时,所有可能的毕达哥拉斯三角形。它通过两个嵌套的循环来计算所有可能的 A 和 B 值,并检查它们是否能够组成一个毕达哥拉斯三角形。对于每个找到的毕达哥拉斯三角形,程序将其输出到控制台。
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