hello guys...i just done my assignment and here's the code

#include <iostream>

using namespace std;

class CelestialBody
{

private:
double size;
public:
    CelestialBody (double );
;

class Planet : public CelestialBody
{
private:

double orbit_time;
public:
  Planet(double , double);

};

Class Earth : public Planet

{

private:
unsigned long int population ;

public:

   Earth();
};

Celestialbody :: Celestialbody (double) :
size(SIZE)
{
cout<<"CelestialBody is called"<<endl;
}

Planet :: Planet (double) : size(SIZE) , orbit_time(ORBIT_TIME)
{
cout <<  "Planet constructor is called"<<endl;





Earth :: Earth ()

: Planet (1,40000), population (3000000000)

{

cout <<" Earth constructor is called."<<endl;
cout <<"Population =" <<population <<endl;
cout<<"orbit time = "<<orbit_time<< endl;
cout<< "size =" <<size <<endl;



int main ()


{
Earth earth;

return 0;

}

the output should be like this

CelestialBody constructor is called
Planet constructor is called
Population  constructor is called

Population = 5000000000

orbit time = 1

size = 40000

but i am stuck in the earth class and constructor section.
I guess i was wrong in calling of the CelestialBody constructor to initialize the
data members of both the Planet and CelestialBody.
I didn't declared SIZE and ORBIT_TIME but it will not effect the end results will it?
any help plez..i did my homework..need for it to be compiled..

ending bracket needed after earth constructor before main, and note sure if you can put comma's in numbers. What problems are you encountering?

ok i got it..sorry

the errors was
\there are some compiling errors caused by -
line 13 - missed '}'
line 25 - class keyword in must belowercase
line 37 - class name must be with letter case exactly as declared
lines 46, 61 - missed '}' after function body

and the planet and celestialbody constructor wasn't correct

so i corrected it and got my end result but need one help on the population..
how to declare it?
i used unsigned long int population but the value was garbage values,,any help?
here's my coding..near perfect.

#include <iostream>
 
using namespace std;
 
class CelestialBody
{
 
protected:
double size;
public:
    CelestialBody (double );
};
 
class Planet : public CelestialBody
{
protected:
 
double orbit_time;
public:
  Planet(double , double);
 
};
 
class Earth : public Planet
 
{
 
protected:
unsigned long int population ;
 
public:
 
   Earth();
};
 
CelestialBody :: CelestialBody (double s) : size(s)
{
cout<<"CelestialBody is called"<<endl;
}
 

Planet :: Planet (double size, double time) : CelestialBody(size) , orbit_time(time)
{
cout <<  "Planet constructor is called"<<endl;
}
 


Earth :: Earth (): Planet (1,40000), population (3000000000)
 
{
 
cout <<" Earth constructor is called."<<endl;
cout <<"Population =" <<population <<endl;
cout<<"orbit time = "<<orbit_time<< endl;
cout<< "size =" <<size <<endl;
 
 
 }
int main ()
 
 
{
Earth earth;
 
return 0;
 
}
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