Ex. 10

int F2 (unsigned int n)
{
    if (n == 0) return n;
    int i=1,j=1,k;
    for (j=j; i<2*n-1; j=j+i)
    {
        k=0;
        for (i=i; k == 0; i=i+2)
            k=1;
    }
    return j;
}