flex-bison-in-action/code.txt

{
    x = 2 + 1;
    x = z + 3 + 5;
    {
        x = 10;
        y = x + 5;
        {
            z = y * 2 / 5 * 3;
        }
    }
    print x;
    return x / 2 + 5;
}