sizeof各タイプのサイズ、クラスのサイズについて

#include <stdio.h>
enum eEnum {TXT, JPG};

class CA
{
public:
	virtual void fV(){};
protected:
private:
};
class CB
{
public:
	void f(){};
protected:
private:
};
class CC
{
public:
	void f(){};
	virtual void fV(){};
protected:
private:
};
class CD
{
public:
	static int a;
protected:
private:
};
class CE
{
public:
protected:
private:
};

int main()
{
	eEnum eA = TXT;
	char chChar = 0;
	short nShort = 0;
	int nInt = 0;
	long lLong = 0;
	float fFloat = 0;
	double dDouble = 0;
	int nSize = sizeof(eA);		//4
	nSize = sizeof(chChar);		//1
	nSize = sizeof(nShort);		//2
	nSize = sizeof(nInt);		//4
	nSize = sizeof(lLong);		//4
	nSize = sizeof(fFloat);		//4        
	nSize = sizeof(dDouble);	//8        
	CA a;
	nSize = sizeof(a);			//4        4  
	CB b;
	nSize = sizeof(b);			//1           ,     size
	CC c;
	nSize = sizeof(c);			//4        4             ,     size
	CD d;
	nSize = sizeof(d);			//1 static     size,          static  ,                 
	CE e;
	nSize = sizeof(e);			//1                         1

	return 0;
}