what are te correct declaration and codes for the following program to work and please explain how the codes work? $"$

#include

extern int add$($int a$,$ int b$)$; $//$ External declaration for assembly function

int main$()\{$

$//$ Prompt user for calculator operation

printf$("$Choose operation $(+,-,*,/)$: $")$;

char operation;

scanf$("\%$c$",$ &operation$)$;

$//$ Prompt user for two numbers

printf$("$Enter first number: $")$;

int num$1$;

scanf$("\%$d$",$ &num$1)$;

printf$("$Enter second number: $")$;

int num$2$;

scanf$("\%$d$",$ &num$2)$;

int result;

$//$ Call appropriate assembly routine based on the chosen operation

switch $($operation$)\{$

case $\text{'}+\text{'}$:

result $=$ add$($num$1,$ num$2)$; $//$ Call assembly routine for addition

break;

$//$ Add cases for other operations

default:

printf$("$Invalid operation

$")$;

return $1$; $//$ Exit with an error code

$\}$

$//$ Print the result to the console

printf$("$Result: $\%$d

$",$ result$)$;

return $0$; $//$ Exit successfully

$\}$

$```$

Now, the corresponding assembly language file $(`$calculator$\_$asm.asm$`)$ for the addition operation:

$```$assembly

section $.$text

global add ; Make the symbol add globally accessible

add:

; Purpose: Add two numbers

; Input: eax $=$ first number, ebx $=$ second number

; Output: eax $=$ result of addition

add eax, ebx ; Add the two numbers

ret ; Return control to the calling C program