text: #include<iostream>
  #include<string>
  using namespace std;
  
  
  string check_armstrong(long long number){
      long long sum_of_digits = 0;
      long long value = number;
      while(number){
          int unit = number % 10;
          sum_of_digits += (unit*unit*unit); 
          number = number / 10;
      }
      return value == sum_of_digits?"\tIt is Armstrong Number":"\tNot A Armstrong Number";
  }
  
  int main(){
      cout<<check_armstrong(153)<<endl;   // It is armstrong number.    
      cout<<check_armstrong(102)<<endl;
  }
  