Inline ASM Calculator

Below is a basic Calculator i made using Inline ASM in C++. The functions include addition, subtraction, division and multiplication.

Code:

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/*
Basic Asm Calculator
Showing how to code some simple functions
in C++ using Inline Asm!

Just on the Asm Functions you do not need
to have the ';' at the end of each line
I have just come custom to it but it make no
great deal!
*/

#include <windows.h>
#include <iostream.h>

//Function Prototypes need to be declared the 'main'
//function however does not need to be declared
int Add(int x, int y);
int Sub(int x, int y);
int Div(int x, int y);
int Mul(int x, int y);


int main ()
{
        int func;          //Function to use, see the switch statement
        int x,y;          //x and y = number 1 and number 2 respectively :)
        bool finish=false; //just a boolean so the program won't close ;)

        while (finish==false) //loop begins so program won't exit when done :D
        {
                cout<<"1:Add, 2:Sub, 3:Div, 4:Mul\n";
                cout<<"Please enter a number to represent the function\n";
                cin>>func; //enter number representing the proper function
                cout<<"Enter first number\n";
                cin>>x; //enter first number
                cout<<"Enter second number\n";
                cin>>y; //enter second number

                switch(func) //remeber func is an integer type
                {
                case 1:
                        cout<<Add(x,y)<<endl; //if func = 1 then Add x and y
                        break;
                case 2:
                        cout<<Sub(x,y)<<endl; //if func = 2 then subtract x and y
                        break;
                case 3:
                        cout<<Div(x,y)<<endl; //if func = 3 then divide x and y
                        break;
                case 4:
                        cout<<Mul(x,y)<<endl; //if func = 4 then multiply x and y
                        break;
                }
        }
        return 0;
}


int Add(int x, int y)
{
        __asm
        {
                mov eax,x;
                mov ebx,y;
                add eax,ebx;
                mov x,eax;
        }
        return x;
}

int Sub(int x, int y)
{
        __asm
        {
                mov eax,x;
                mov ebx,y;
                sub eax,ebx;
                mov x,eax;
        }
        return x;
}


int Div(int x, int y)
{
        __asm
        {
        mov eax,x;
        mov ecx,y;
        sub edx,edx;
        div ecx;
        mov x,eax;
        }
        return x;
}

int Mul(int x, int y)
{
        __asm
        {
        mov eax,x;
        mov ebx,y;
        mul ebx;
        mov x,eax;
        }
        return x;
}

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Hope it helps a little ;)