Error in the main to call the function !

[alsatrawi]

i get this erorr today when im trying to use the inhertance with class , and I was surprised by this error in the main say

1- error C2374: 'D' : redefinition; multiple initialization

2- see declaration of 'D'

but when i remove the D things get worse and complex

THE ERORR IN THE LINE 60

the program :

# include <iostream>
using namespace std;
class base
{
private:
	int u;
	int v;
public:
	base();
	base(int,int);
	void print();
};
class Derived:public base
{
private:
	float first;
	int second;
public:
	Derived();
	Derived(int,int,float,int);
	void print();
};

base::base()
{u=0;
v=1;
cout << "base";}

void base::print()
{cout << u << " " <<v;}

base::base(int a, int b)
{
	u=a;
	v=b;
}

Derived::Derived()
{
	first=10;
	second=15;
}

void Derived::print()
{
	base::print();
	cout << first << "  " << second << endl;
}



void main()
{
	base B;
	B.print();
	base (2,3);
	B.print();
	Derived D;                 
	D.print();
	Derived D(3,4,5,6);          //here is the error 
	D.print();
}

[LB]

EDIT: You edited your post. Why do you not understand the error? You are defining two different variables with the same name.

void main() //error: should be int main()
{
	base B;
	B.print();
	base (2,3);
	B.print();
	Derived D; //here is the error 
	D.print();
	Derived D(3,4,5,6); //the error is actually here
	D.print();
}

Your other problem is that you need to make your destructors virtual, and your print functions need to be virtual, among other things wrong with your code.

[alsatrawi]

Yes Thanks for the corrective

[LB]

Why don't you understand the error? You're defining two different variables with the same name "D".

[alsatrawi]

we cloudent say int main()
becuase we have functions does not return any thing

[LB]

void main() is illegal C++ syntax. The standard mandates that main must return an int.

In C++, if there is no return statement in main, 0 is automatically returned. This is a special case for the main function.

[alsatrawi]

and what is the correction in the code
before of that i said when i remove the D things get worse and complex
which means i know i have tow variables with same name but when i remove it i have another complex erorr !

[LB]

Think about what it means to have two variables with the same name. Answer: just give them different names.

[zb0S216C]

alsatrawi wrote:

" when i remove it i have another complex erorr !"

...and what's the error?

_Wazzak

[LB]

This is the error:

error: ‘::main’ must return ‘int’

As you can see, it is extremely complex.