#include <cstdlib>
#include <iostream>
#include <regex>

using namespace std;
#define DOT                     "."

int main(int argc, char *argv[])
{
        int number;
        string value;
        cout << "Zadejte číslo: ";
        cin >> value;

        cout << "Hodnota je: " << value << DOT << endl;

        regex reg("^[0-9]+$");

        if(regex_match(value, reg))
        {
                number = atoi(value.c_str());
                cout << "Zadané číslo je " << number << DOT  << endl;
        }else cout << "Hodnota musí být číslo" << DOT << endl;

        system("PAUSE");
        return EXIT_SUCCESS;
}