What happens here? (Bad thread name, I know)

Hallo,

I have this small extract of code from a book I have. But I don't really understand what is going on here. Is t0 and t1 given values in this code, even though Quadratic does not return anything (its a bool)?

Code:

---

        // Solve quadratic equation for _t_ values
        float t0, t1;
        if (!Quadratic(A, B, C, &t0, &t1))
                return false;
        // Compute intersection distance along ray
        if (t0 > ray.maxt || t1 < ray.mint)
                return false;

---

Thanks:)

Quadratic gets pointers to the t0 and t1, so it can modify its values using these pointers... And obviously does it because t0 and t1 are not initialized before the call. At least they should be initialized inside the function when the function returns true... They can be still not initialized if the function returns false...