在下面程序中的横线处填上适当内容，使程序完整。

# include



class vehicle

{

protected:

int size;

int speed;

public;

void setSpeed(int s){speed=s;}

virtual int getSpeedLevel( ){return speed/10;}

};

class car:public vehicle

{

public:

int getSpeedLeve( ){return speed/5;}

};

class truck:public vehicle

{

public:

int getspeedLevel( ){return speed/15;}

};

int maxSpeedLevel(vehicle &v1 ,vehicle )

{

if(v1.getSpeedLevel( )>v2.getSpeedLevel( ))

return 1;

else

reutrn 2;

}

void main()

{

turck t;

car c;

t.setSpeed(130);

c.setSpeed(60);

cout<<><>

}