sizeof(class)

//#define _REENTRANT

//#define _POSIX_C_SOURCE

#include <iostream>

#include <string>

#include <cstdio>

#include <assert.h>

#include <cstring>

#include <error.h>

#include <unistd.h>

#include <sys/types.h>

#include <signal.h>

#include <pthread.h>

using namespace std;

#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <pthread.h>

class A

{

public:

void virtual aa(){}

//char x;

};

class B:public A

{

void virtual bb(){}

};

class C:virtual A

{

public:

void virtual aa(){}

void cc(){}

//double ch;

};

class D:virtual A

{

public:

//void virtual dd(){}

};

class E: A,B,C, D{

public:

    E() {}

};

class F: A{

public:

    F() {}

};

int main() {

    cout<<"sizeof(A)="<<sizeof(A)<<endl;

    cout<<"sizeof(B)="<<sizeof(B)<<endl;

    cout<<"sizeof(C)="<<sizeof(C)<<endl;

    cout<<"sizeof(D)="<<sizeof(D)<<endl;

    cout<<"sizeof(E)="<<sizeof(E)<<endl;//4*8 64bit multi inherient

    cout<<"sizeof(F)="<<sizeof(F)<<endl;//8

    //cout <<"  -------*"<< endl;

    exit(EXIT_SUCCESS);

}