1. (C) Design the class Demo which will contain the following methods: readNo(), factorial() for calculating the factorial of a number, reverseNo() will reverse the given number, isPalindrome() will check the given number is palindrome, isArmstrong() which will calculate the given number is armStrong or not.Where readNo() will be private method.

1. (C) Design the class Demo which will contain the following methods: readNo(), factorial() for calculating the factorial of a number, reverseNo() will reverse the given number, isPalindrome() will check the given number is palindrome, isArmstrong() which will calculate the given number is armStrong or not.Where readNo() will be private method.

	#include<iostream.h>
	#include<conio.h>
	class abc
	{
	int a1,a2,a3,a4;
	void readno_fact()
	{
	cout<<"enter the number to find the factorial:";
	cin>>a1;
	}
	void readno_rev()
	{
	cout<<"\nenter the number to find the reverse number:";
	cin>>a2;
	}
	void readno_pal()
	{
	cout<<"\nenter the number to find the palindrome number :";
	cin>>a3;
	}
	void readno_ams()
	{
	cout<<"\nenter the number to find the amstrong number :";
	cin>>a4;
	}
	public:
	void factorial();
	int reverseno();
	void palindrome();
	void amstrong();
	};
	void abc::factorial()
	{ readno_fact();
	double x,fact=1;
	x=a1;
	for(int i=1;i<=x;i++)
	{
	fact=fact*i;
	}
	cout<<"\nthe factorial of number is :"<<fact<<endl;
	}
	int abc::reverseno()
	{ readno_rev();
	int y,rem,temp=0;
	y=a2;
	while(y!=0)
	{
	rem=y%10;
	temp=10*temp+rem;
	y=y/10;
	}
	return temp;
	}
	void abc::palindrome()
	{ readno_pal();
	int pp,temp2=0,rem2=0;
	pp=a3;
	while(pp!=0)
	{
	rem2=pp%10;
	temp2=10*temp2+rem2;
	pp=pp/10;
	}
	if(temp2==a3)
	{
	cout<<"\nthe number is palindrome\n";
	}
	else
	{
	cout<<"\nthe number is not palindrome\n";
	}
	}
	void abc::amstrong()
	{ readno_ams();
	int z,sum=0,r;
	z=a4;
	while(z!=0)
	{
	r=z%10;
	sum=sum+r*r*r;
	z=z/10;
	}
	if(sum==a4)
	cout<<"\nthe number is amstrong";
	else
	cout<<"\nthe number is not amstrong";
	}
	void main()
	{
	clrscr();
	abc anynum;
	anynum.factorial();
	int r=0;
	r=anynum.reverseno();
	cout<<"\nreverse of the number is :"<<r<<endl;
	anynum.palindrome();
	anynum.amstrong();
	getch();
	}