Looking at the C version, I wondered if it could be done without temporaries curr and prev. My no-temporaries version is not really any nicer, though it does shave off a few lines. :P

    void pascal(int n, int *buf)
    {
        for (int i = 0; i < n; i++) {
            buf[i] = 1;
            for (int j = i - 1; j > 0; j--)
                buf[j] += buf[j - 1];
        }
    }