C++ Wcscat() Function

#include<iostream>
#include<cwchar>
using namespace std;
int main()
{
    wchar_t  an[30] , ar[30];

    cout << "Enter 1st String : ";
    wcin >> an;
    cout << endl;

    cout << "Enter 2nd String : ";
    wcin >> ar;
    cout << endl;

    wcscat(an, ar);

    wcout << "Concatenated Wide String is : " << an << endl;

    return 0;
}