It is necessary to read three numbers from the keyboard, subtract the rest from the…

Unfortunately, as an AI language model, I do not have the capability to read inputs from the keyboard or execute programs in NASM. However, I can provide you with an algorithm in pseudocode that can help you understand how to approach this problem:

1. Read the first number (let's call it A) from the keyboard
2. Read the second number (let's call it B) from the keyboard
3. Read the third number (let's call it C) from the keyboard
4. Subtract B and C from A and store the result in a register (let's call it R)
5. Output the result as an equality in the following format: "A - B - C = R"

Here's an example of how this algorithm would work:

Input: A = 10 B = 3 C = 2

Processing: R = A - B - C = 5

Output: 10 - 3 - 2 = 5

I hope this helps!

Here is an example NASM code that reads three numbers from the keyboard, subtracts the rest from the first, and outputs the result as an equality:

section .data

prompt db 'Enter a number: ', 0
result db '%d - %d - %d = %d', 10, 0

section .bss

num1 resd 1
num2 resd 1
num3 resd 1
res resd 1

section .text
global _start

_start:
    ; Print the prompt for the first number
    mov eax, 4
    mov ebx, 1
    mov ecx, prompt
    mov edx, 16
    int 0x80

    ; Read the first number from the keyboard
    mov eax, 3
    mov ebx, 0
    mov ecx, num1
    mov edx, 4
    int 0x80

    ; Print the prompt for the second number
    mov eax, 4
    mov ebx, 1
    mov ecx, prompt
    mov edx, 16
    int 0x80

    ; Read the second number from the keyboard
    mov eax, 3
    mov ebx, 0
    mov ecx, num2
    mov edx, 4
    int 0x80

    ; Print the prompt for the third number
    mov eax, 4
    mov ebx, 1
    mov ecx, prompt
    mov edx, 16
    int 0x80

    ; Read the third number from the keyboard
    mov eax, 3
    mov ebx, 0
    mov ecx, num3
    mov edx, 4
    int 0x80

    ; Subtract the second and third numbers from the first number
    mov eax, [num1]
    sub eax, [num2]
    sub eax, [num3]
    mov [res], eax

    ; Prepare the output string
    mov ebx, [num1]
    mov ecx, [num2]
    mov edx, [num3]
    mov esi, [res]
    mov edi, result
    xor eax, eax
    push ebx ; format specifier for %d
    push esi ; res
    push edx ; third number
    push ecx ; second number
    push ebx ; first number
    call printf

    ; Exit the program with status code 0
    mov eax, 1
    xor ebx, ebx
    int 0x80

Note that this code uses the printf function from the C standard library to format and output the result string, which means that you need to link it with the -lc flag when assembling and linking the code.

Here is an example NASM code that reads three numbers from the keyboard using scanf, subtracts the rest from the first, and outputs the result as an equality using printf:

section .data

prompt db 'Enter three numbers: ', 0
result db '%d - %d - %d = %d', 10, 0
format db '%d %d %d', 0

section .bss

num1 resd 1
num2 resd 1
num3 resd 1
res resd 1

section .text
global _start

extern scanf
extern printf

_start:
    ; Print the prompt
    mov eax, 4
    mov ebx, 1
    mov ecx, prompt
    mov edx, 22
    int 0x80

    ; Read three numbers from the keyboard
    mov eax, 0
    mov ebx, format
    mov ecx, num1
    mov edx, 0
    call scanf
    mov ecx, num2
    call scanf
    mov ecx, num3
    call scanf

    ; Subtract the second and third numbers from the first number
    mov eax, [num1]
    sub eax, [num2]
    sub eax, [num3]
    mov [res], eax

    ; Prepare the output string
    mov ebx, [num1]
    mov ecx, [num2]
    mov edx, [num3]
    mov esi, [res]
    mov edi, result
    xor eax, eax
    push ebx ; format specifier for %d
    push esi ; res
    push edx ; third number
    push ecx ; second number
    push ebx ; first number
    call printf

    ; Exit the program with status code 0
    mov eax, 1
    xor ebx, ebx
    int 0x80

Note that this code uses the scanf function from the C standard library to read the three numbers from the keyboard, and the printf function to output the result string. To assemble and link the code, you need to use the following commands:

nasm -f elf32 your_file.asm
gcc -m32 -o your_program your_file.o -lc

This will produce an executable file called your_program that you can run to test the code.

Вот пример кода на NASM, который читает три числа с клавиатуры, вычитая из первого остальные и выводит результат в виде равенства:

section .data
prompt db 'Введите три числа: ', 0
format db '%d %d %d', 0
result db '%d - %d - %d = %d', 10, 0

section .bss
num1 resd 1
num2 resd 1
num3 resd 1
res resd 1

section .text
global _start

extern printf
extern scanf

_start:
  ; вывести приглашение
  mov eax, 4
  mov ebx, 1
  mov ecx, prompt
  mov edx, 20
  int 0x80

  ; прочитать три числа
  mov eax, 0
  mov ebx, format
  mov ecx, num1
  xor edx, edx
  call scanf
  mov ecx, num2
  call scanf
  mov ecx, num3
  call scanf

  ; вычислить разность
  mov eax, [num1]
  sub eax, [num2]
  sub eax, [num3]
  mov [res], eax

  ; вывести результат
  mov ebx, [num1]
  mov ecx, [num2]
  mov edx, [num3]
  mov esi, [res]
  mov edi, result
  xor eax, eax
  push ebx ; спецификатор формата для %d
  push esi ; результат
  push edx ; третье число
  push ecx ; второе число
  push ebx ; первое число
  call printf

  ; завершить программу с кодом 0
  mov eax, 1
  xor ebx, ebx
  int 0x80

Обратите внимание, что этот код использует функции printf и scanf из стандартной библиотеки C. Чтобы собрать код, используйте следующие команды:

nasm -f elf32 your_file.asm
gcc -m32 -o your_program your_file.o -lc

Это создаст исполняемый файл your_program, который вы можете запустить, чтобы протестировать код.