Class related short question

[belgarionriva]

How do you write a vector called from a class, inside another function called from a class? It says intVectorOne is undefined...

  class Board 
{
public:
	void Solve();
private:
        vector<int> intVectorOne(N); /*where N is user defined, somewhere else in my program)*/ 
        int is_valid();
}

int is_valid()
{
for (int i = 0; i < N-1; i++) 
	{
		for (int j = i + 1; j < N; j++) 
		{
			if (intVectorOne[i]=intVectorOne[j]//ERROR: Identifier 'intVectorOne' is undefined.
                         {/*stuff*/}
	        }
	 }
}



void Board::Solve()
if(is_valid())
{
//stuff
}

[keskiverto]

The definition of is_valid defines a standalone function. Compare the syntax to Board::Solve(), which clearly defines a member of Board.

Is it really safe to use 7 and 8, if N is something random?

[belgarionriva]

You're right, I was assuming N to be '8'. I changed it. I'll try to imitate the syntax, thanks.

[belgarionriva]

Changed is_valid() to int Board::is_valid() Now I get the error:

function call missing argument list; use '&Board::intVectorOne' to create a pointer to member

And

Apparently, my
vector<int> intVectorOne(N); has the error:
syntax error : identifier 'N'

This is so hard... T_T

[belgarionriva]

Erhm... the problem solved itself, I don't know why or how... thanks guys...? :/

[keskiverto]

Compiler thinks that line 6 is a member function declaration. Initialize the vector in constructor.

Definition of class ends with a semicolon (line 8).

[belgarionriva]

Line 8 was correct in my program, it was only a mistake here, as for line 6, what do you mean "Initialize the vector in constructor."?

[keskiverto]

Board is a class. Classes have constructors. Constructor initializes an object when the object is created. Part of initialization is the creation of the member variables. Read about class member initializer lists.