回复：给自己看的贴

15.3.1:
#include "iostream"
using namespace std;
class A
{
public:
int i;
virtual void func(){
}
virtual void func2(){
}
};
class B:public A
{
int j;
virtual void func(){
}
};
int main()
{
cout<<sizeof(A)<<","<<sizeof(B);
return 0;
}

15.4.3:
#include "iostream"
using namespace std;
class A
{
public:
void func1()
{
cout<<"AAAAAAA::F1"<<endl;
}
virtual void func2()
{
cout<<"AAAA::F2222222222"<<endl;
}
};
class B:public A
{
public:
virtual void func1()
{
cout<<"bbbbbbb::F1"<<endl;
}
void func2()
{
cout<<"BBBBBBBBBB::F2"<<endl;
}
};
class C:public B
{
public:
void func1()
{
cout<<"CCCCCCCCC::F1"<<endl;
}
void func2()
{
cout<<"CCCCCCCC::F2"<<endl;
}
};
int main()
{
C obj;
A *pa=&obj;
B *pb=&obj;
pa->func2();
pa->func1();
pb->func1();
return 0;
}

15.4.1:
#include "iostream"
using namespace std;
class CBase
{
public:
void func1()
{
func2();
}
virtual void func2()
{
cout<<"CBASE::F2"<<endl;
}
};
class CDerived:public CBase
{
public:
virtual void func2()
{
cout<<"CD::F2"<<endl;
}
};
int main()
{
CDerived d;
d.func1();
return 0;
}

15.5.1:
#include "iostream"
using namespace std;
class CShape
{
public:
~CShape()
{
cout<<"CSHAPE::DDDDDDDDD"<<endl;
}
};
class CRectangle:public CShape
{
public:
int w,h;
~CRectangle()
{
cout<<"CEEC::DDDDDDDD"<<endl;
}
};
int main()
{
CShape *p=new CRectangle;
delete p;
return 0;
}

16.5.2.3:
#include "iostream"
#include "iomanip"
#include "string"
using namespace std;
string Months[12]={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"
};
int main()
{
int c;
while ((c=cin.peek())!=EOF)
{
int year,month,day;
if(c>='A'&&c<='Z')
{
string sMonth;
cin>>sMonth>>day>>year;
for(int i=0;i<12;++i)
if(sMonth==Months[i])
{
month=i+1;
break;
}
}
else
{
cin>>year;
cin.ignore()>>month;
cin.ignore()>>day;
}
cin.ignore();
cout<<setfill('0')<<setw(2)<<month;
cout<<"-"<<setw(2)<<day<<"-"<<setw(4)<<year<<endl;
}
return 0;
}

#include "iostream"
#include "iomanip"
#include "string"
using namespace std;
http://www.cocoachina.com/swift/20160118/14947.html
string Months[12]={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"
};
int main()
{
int c;
while ((c=cin.peek())!=EOF)
{
int year,month,day;
if(c>='A'&&c<='Z')
{
string sMonth;
cin>>sMonth>>day>>year;
for(int i=0;i<12;++i)
if(sMonth==Months[i])
{
month=i+1;
break;
}
}
else
{
cin>>year;
cin.ignore()>>month;
cin.ignore()>>day;
}
cin.ignore();
cout<<setfill('0')<<setw(2)<<month;
cout<<"-"<<setw(2)<<day<<"-"<<setw(4)<<year<<endl;
}
return 0;
}