#include <iostream>

using namespace std;

int main()
{

    string test;
    string email;
    bool isCharacter();
    bool isNumber();
    bool isValidEmailAddress(string);

    cout << "Vnesi ja e-mail adresata i proveri dali e validna ili ne "<<endl;
    cin>>email;

    test=email;

    if (isValidEmailAddress  )
        cout << "Tvojoata e-mail adresa e validna.";
    else
        cout << "Tvojata e mail adresa ne e validna, Obidi se povtorno."<<endl;
    cin>>email;


    return 0;

}