请指出下面程序中不合理的地方。
C．lass A
{
public:
A．(void) : m_nVar2(m_nVar1), m_nVar1(0), m_cVar3(0)
{
m_cVar3 =3;
}
protected:
int m_nVar1;
int m_nVar2;
const int m_cVar3;
};
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