I need some help, Please!

[DaRok28]

#include <iostream>
using namespace std;

int GCD(int a, int b)
{
   while(1)
   {
      a = a % b;
         if(a ==0)
            return b;
         b = b % a;
      if(b == 0)
         return a;
   }
}

int LCM(int x, int y)
{
   int i;
   if (x > Y)
      for(i = y; i <= x * y; i++)
      {
         if (i % x == 0 && i % y ==0)
            return i;
      }
   else
      for(i = y; i <= x * y; i++)
      {
         if(i % x == 0 && i % y ==0)
            return i;
      }
   return i;
}

int main()
{
   char cAgain;
   int x, y;
   
   do
   {
      cout << endl << "Please enter value one: " << endl << endl;
      cin >> x;
      cout << endl << "Please enter value two: " << endl << endl;
      cin >> y;
      cout << endl << "The Greatest Commin Factor of "
           << x << " and " << y << " is " << GCD(x,y) << endl;
      cout << endl << "The Least Common Multiple of " 
           << x << " and " << y << " is " << LCM(x,y) << endl;
      cout << "Would you like to calculate another? Y/y/N/n"
           << endl << endl;
      cin >> cAgain;
   }while(cAgain == 'Y' || cAgain == 'y');
   
   cout << endl << "Thank you for using this program." << endl;
   
   return 0;
   
}

There is my code. And it works except when i use the numbers -10 and zero in that order. The error says Floating Point Exception and just stops. So I was wondering what that means and how do I fix it in my code. Thanks

[Ganon11]

Does this problem occur every time you include a 0, or only when you include a 0 as the second number, or only when you include -10? I suspect the error comes when you try and use modulus division by 0, but I can't be sure.

[DaRok28]

Does this problem occur every time you include a 0, or only when you include a 0 as the second number, or only when you include -10? I suspect the error comes when you try and use modulus division by 0, but I can't be sure.

It happens everytime the 0 is the second number.

[Ganon11]

Probably division by zero, then. You should add a message informing the user that he/she cannot enter 0. If you like, you can also add some error trapping that will prevent the user from entering 0.