Can a variable be initialized with an istream on the same line it is declared? [duplicate]

Answer 1

Using a function:

int inputdata()
{
    int data;
    std::cin >> data;
    return data;
}

Then:

int a=inputdata();

For data itself:

int inputdata()
{
    static bool isDataDeclared=false;
    if (isDataDeclared==true)
    {
    goto read_data;
    }
    else
    {
        isDataDeclared=true;
    }
    static int data=inputdata();
    return data;
    read_data:
    std::cin >> data;
    return data;
}