error jump to case label
switch (choice)
{
case 1:
{
get_two_numbers(x, y);
int sum = add(x, y);
cout << x << " + " << y << " = " << sum << endl;
}
break;
case 2:
{
get_two_numbers(x, y);
int diff = subtract(x, y);
cout << x << " - " << y << " = " << diff << endl;
}
break;
default:
break;
}