debug a bug in c++ in eclipse
<p>Hello I worked c++ in eclipse
in XO.h</p>

<pre><code>class Master
{
private:
char board[3][3];

public:
Master();
void change_board(int choice[1],char color);
void start_play(Maximizer,Minimizer);
void end(char winner);
char winner();
void play(Maximizer,Minimizer);

};

class Maximizer{};
class Minimizer{};
</code></pre>

<p>in Xo.cpp</p>

<pre><code>void Master::start_play(Maximizer x ,Minimizer o)
{play(x,o);
 }
</code></pre>

<p>but Eclipse generates an error that "prototype for <code>void Master::start_play(Maximizer, Minimizer)' does not match any in class Master</code>"
  ,please help me</p>
