C++ Program to find the number and sum of all integer

Write a program in C++ to find the number and sum of all integer between 100 and 200 which are divisible by 9.

//Write a program to find the number and sum of all integer between 100 and 200 which are divisible by 9.

//virtual class


#include<iostream>
using namespace std;
class number
{
	public:
		int i;
	};
	class number2:public virtual number
	{
		public:
			int sum;
	};
	class number3:public virtual number
		{
		public:
	int n;
		};
		class final:public number2 , public number3
		{
		public:
			int show_num()
			{
				cout<<"enter a first number of your loop to start loop :"<<endl;
			    cin>>n;
		    	sum=0;
				for(i=n; i<200; i++)
				if(i%9==0)
				{
					cout<<"numbers divisble by 9 is= "<<i<<endl;
					sum=sum+i;
				}
				cout<<"sum of all numbers divisible by 9 is= "<<sum<<endl;	
		}
    };
int main()
{
	final d;
	d.show_num();
}