//TP 2018/2019: ZSR 6, Zadatak 28
#include <iostream>
#include<string>
class SigurniString:public std::string
{
    using std::string::string;
    public:
    SigurniString(const std::string &s):std::string(s){}
    char operator[](int i)
    {
        if(i>=this->size() || i<0) throw std::range_error("Izvan opsega!");
        else
        {
            return this->std::string::operator[](i);
        }
    }

};
int main ()
{
    try
    {
        SigurniString s="senad";
        std::cout<<s[5];
    }
    catch(std::range_error izuzetak)
    {
        std::cout<<izuzetak.what()<<std::endl;
    }
	return 0;
}