Why 1 universal struct working from within a class, but not these others

wtf (670)
I defined the following structs in my class header file, but before the actual class definition. 

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struct int3{
    int r;
    int c;
    int n;
};

struct n2 {int r; int c;};
struct lex { n2 bob[25]; dlist crowd; };


However I could not utilize my constructor for my dlist as I had intended. I had wanted to initialize the dlist as such: dlist(9,0); but I get all sorts of error messages.

So I decided I would just declare an instance of a lex within a class function where it is needed, and then resize it as such: 
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lex a;
a.crowd.resize(9);
for (int b = 0; b < 9; ++b)
    {
        a.crowd.removeN(b+1);
    }

But I get the following error messages:
expected unqualified-id before '.' token (in re: for a.crowd.resize(9); )
expected primary expression before '.' token (in re: a.crowd.removeN(b+1); )

However, I am able to access int3 and n2s with no problems. Why don't it work?
Thanks in advance!
wtf (670)
P. S. Also n2 bob[25]; was supposed to have been n2 bob[SIZE]; SIZE being a public member variable, which understandably would not have worked declared universally as such, but even when I tried declaring the struct definitions inside a member function it would not compile.
jsmith (5804)
Post the actual source code and error message.
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