Question

It’s not clear for me how can i do that in C++. In Objective-C I can check a object in this way

if (myValue != [NSNull null]) { … }

myValue is compared with a null object (returned by class method), so this works great , if object has a value, even nil, if statement will return true.

So question is how to test correctly for a null pointer value, i did this way

if (myValue != NULL)
{
    qDebug() << "It is not null";
}

but it is not working.

Answer 1

In C++ there’s really no concept of null value, only null pointers. You can’t compare something that isn’t a pointer to NULL.