simple calc

void calc(float x, float y, char operation, float& result)
{

	switch (operation)
	{
		case '+':
			result = x + y;
			return;

		case '-':
			result = x - y;
			return;

		case '*':
			result = x * y;
			return;

		case '/':
			VERIFICA SA NU FIE y == 0
			result = x / y;
			return;

		default:
		  EROARE PE AICI
	}
}