#include <iostream>
#include <cmath>
#include <string>


void UnosBroja( std::string &s, std::string &r, int &n )
{
    std::cout<<s;

    for (;;)
    {
        std::cin>>n;
        if (std::cin) break;
        std::cout<<s;
        std::cout<<r;
       std::cin.clear();
       std::cin.ignore(1000, '\n');


    }
}


int main()
{

int n;
double x;

std::string s="Unesi prvi broj: ";
std::string r="Neispravan unos! \n";

UnosBroja(s,r,n);

std::cout<< "Unesi realan broj x:\n";
std::cin>>x;
std::cout<< "Stepen x^n je: " << pow(x,n) << std::endl;


return 0;
}