#include

    using namespace std;

    class Root{

    private:

            static unsigned long double pow(unsigned long double number, 
int power){

                    unsigned long double retVal = number;

                    for(int i=0; i
                            retVal *= number;
                    }
                    return retVal;
            }
    public:
            static unsigned long double nroot(unsigned long double number, int root)
{
                    if(number < 0){
                            throw "ERROR - It is possible that tere were no real 
answers.nNumber entered was less than 0.";
                    }
                    unsigned long double low = 0, high = (number/2)+1, mid = 
(low+high)/2;
                    for(;(low < high) && ((pow(mid, root)-number)>0.000001 ||
 (pow(mid, root)-number)<-0.000001); mid = (low+high)/2){
                            if(pow(mid, root) < number){
                                    low = mid;
                            }
                            else if(pow(mid, root) > number){
                                    high = mid;
                            }
                            else{
                                    return mid;
                            }
                    }
                    return (low+high)/2;
            }
            static unsigned long double sqrt(unsigned long double number){
                    return nroot(number, 2);
            }
    };
     
    int main(...){
            try{
                    cout << endl << Root::nroot(123.14159, 15) << endl;
            }
            catch(char* error){
                    cout << error << endl;
            }
     
            return 0;
    }