void bisekcja(double F(double s, STRZAŁ *q), double a, double b)
{
    double x=F(a, q);
    double y=F(b, q);
    if(x=0) return a;
    if(y=0) return b;
    double ss=(b-a)/2.0;
    double e=1.0/1000000;
    while(abs(F(ss, q))>e)
        if(F(a, q)*F(ss, q)<0)
        {
            x=a;
            y=ss;
        }
        else
        {
            x=ss;
            y=b;
        }

    return ss;

}