C++ array initialization not working

Question

I am trying to initialize an array of bools like so:

bool FcpNumberIsOk[MAX_FCPS]={true};

but when I debug it, I only see the first element of the array initialized, the others are false. How can that be so? I am using Qt on ubuntu 10 and the initialization is done on a local array inside a method.

Ok thanks for your answers.

Answer 1

You've misunderstood. It appears that you though that any unmentioned elements would get initialized to the same value as the last explicitly initialized value. The last value you mentioned was true, so all further elements would be initialized to true as well. I once had that same belief, but I quickly learned otherwise.

That's not how it works. Any unmentioned elements get default-initialized, which for bool means false.

To set all the elements to true, try something like std::fill_n:

std::fill_n(FcpNumberIsOk, MAX_FCPS, true);