class layout basic

#include<iostream>
using namespace std;

class a{
}aObj;

class b{
    char x;
}bObj;

class c{
    virtual void foo(){};
    char x;
}cObj;

class d{
    void foo(){};
    char x;
}dObj;

class e{
    char a;
    char x;
}eObj;

class f{
    double a;
    char x;
}fObj;

class g{
    int a;
    char x;
}gObj;

class h{
    short a;
    char x;
}hObj;

class i{
    double b;
    short a;
    char x;
}iObj;

class j{
    void virtual foo(){};
}jObj;

int main(){
    cout<<"aObj "<<sizeof(aObj)<<endl;
    cout<<"bObj "<<sizeof(bObj)<<endl;
    cout<<"cObj "<<sizeof(cObj)<<endl;
    cout<<"dObj "<<sizeof(dObj)<<endl;
    cout<<"fObj "<<sizeof(fObj)<<endl;
    cout<<"gObj "<<sizeof(gObj)<<endl;
    cout<<"hObj "<<sizeof(hObj)<<endl;
    cout<<"iObj "<<sizeof(iObj)<<endl;
    cout<<"jObj "<<sizeof(jObj)<<endl;
    return 0;
}


//aObj 1
//bObj 1
//cObj 16
//dObj 1
//fObj 16
//gObj 8
//hObj 4
//iObj 16
//jObj 8