11.5 面试例题2

#include 
using namespace std;

 class Base {
 public:
 int val;
 Base() { val=1;};
};

 class Derive: Base {
 public:
 int val;
 Derive(int i) { val=Base::val+i; };
};

 int main(int, char**, char**) {
 Derive d(10);
cout<return 0;
}

class Eye
{
public:
void Look(void); 
};

class Nose
{
public:
void Smell(void);
};

class Mouth
{
public:
void Eat(void); 
};

class Ear
{
public:
void Listen(void);
};

class Head
{
public:
void Look(void) { m_eye.Look(); }
void Smell(void) { m_nose.Smell(); }
void Eat(void) { m_mouth.Eat(); }
void Listen(void) { m_ear.Listen(); }

private:
Eye m_eye;
Nose m_nose;
Mouth m_mouth;
Ear m_ear;
};

class Head : public Eye, public Nose, public Mouth, public Ear
{
};