Lab Description
A basic 32 bit calculator that has a menu that asks the user for which operation they want to do. The calculator supports
adding, subtracting, and multiplication. The calculator does not use any loops or mul function; it uses labels and jumps to do most operations. The calculator will not exit until the user presses 0.

Code

program lab3;
#include("stdlib.hhf")
static
x:int32;
y:int32;
r:int32;
choice:int32;

begin lab3;

loop_menu:

stdout.put("Enter 1 to add numbers: ",nl);

stdout.put("Enter 2 to subtract numbers: ",nl);

stdout.put("Enter 3 to multiply numbers: ",nl);

stdout.put("Enter 0 to exit: ",nl);

stdin.get(choice);

mov(choice,edx);

cmp(edx,1);
jne a;
		mov(0,r);
		stdout.put("enter number 1: ");
		stdin.get(x);
		stdout.put("enter number 2: ");
		stdin.get(y);
		mov(x,eax);
		mov(y,ebx);
		add(ebx,eax);
		mov(eax,r);
		stdout.put("The answer is: ",r,nl);
		jmp loop_menu;
		
a:

cmp(edx,2);
jne s;
		mov(0,r); 
		stdout.put("enter number 1: ");
		stdin.get(x);
		stdout.put("enter number 2: ");
		stdin.get(y);
		mov(x,eax);
		mov(y,ebx);
		sub(ebx,eax);
		mov(eax,r);
		stdout.put("The answer is: ",r,nl);
		jmp loop_menu;
		
s:

cmp(edx,3);
jne m;
		mov(0,r);
		stdout.put("enter number 1: ");
		stdin.get(x);
		stdout.put("enter number 2: ");
		stdin.get(y);
		mov(x,eax);
		mov(y,ebx);
mul_loop:	
		cmp(ebx,0);
		jle mul_end;
			       add(eax,r);
			       sub(1,ebx);
			       jmp mul_loop;
mul_end:	
		stdout.put("the answer is: ",r,nl);
		stdout.put(nl);
		jmp loop_menu;
		
m:

cmp(edx,0);
jne loop_menu;
stdout.put("End Of Program");
end lab3;

Screenshot