#include <iostream>
#include <string>
#include <regex>
using namespace std;

int main()
{
        string fv;
        regex e ("[,]",std::regex_constants::icase);

        cout << "Indtast something, something: ";
        getline (cin, fv);

        cout << "Mangeling ...\n\n";
        fv = regex_replace(fv, e, ".");
        float a = atof(fv.c_str());
        cout << "Result:" << a;
        cout << "\n\n";
}