Write A Program To Find Number Is Armstrong Or Not In C#?

The other answer is perfectly correct, but will not compile with g++ - this is a modified version that will:

#include <iostream>
#include <math.h>
using namespace std;

int main ()
{
    int a,b=0,sum=0;
    long int n, store;
   
    cout <<"Enter the Number. : ";
    cin >> n;
    store = n;

    for(;n>0;)
    //counts the digits
    {
        a=n%10;
          n=n/10;
          b++;
    }   
    for(;n>0;)
    {
        a=n%10;
          sum=sum+pow(a,b);
          n=n/10;
    }
      if(sum==n)
    {
        cout << store << " is an Armstrong number" << endl;
        return 0;
    }
      else
    {
        cout << store << " is not an Armstrong number << endl;
        return 0;
    }
}

# include <iostream.h>
# include <conio.h>
# include <math.h>
void main ()
{ clrscr();
int a,b=0,sum=0;
long int n;
cout<<"ENter the NO. : ";
cin>>n;
for(;n>0;)
//counts the digits
{ a=n%10;
  n=n/10;
  b++;
}
for(;n>0;)
{ a=n%10;
  sum=sum+pow(a,b);
  n=n/10;
}
  if(sum==n)
{ cout<<"IT IS AN ARMSTRONG NUMBER...";
  getch();
}
  else
{ cout<<"IT IS NOT AN ARMSTRONG NUMBER...";
  getch();
}
}

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