Graded_Program1.cpp

#include <iostream>
using namespace std;

// Please write your code, within the "BEGIN-END" blocks given below.
// A "BEGIN-END" block is identified as follows :
//
// "//// BEGIN: Some string DONT_ERASE_xx_yy"
//
//
// "//// END: Some other string DONT_ERASE_xx_yy"
//
// where "xx" is the block number and "yy" is the
// marks allocated for the block
//
// The FIRST block (BLOCK 1 i.e. DONT_ERASE_01_0) carries 0 marks and
// is a placeholder for your personal information, to be written as a comment.
//
// WARNING :
// (1) Do NOT write any cout or cin statements
// (2) Do NOT delete or modify the existing code i.e. main function, comments, blocks, etc.
// (3) Write your code in between BEGIN and END of the respective blocks only
// (4) Do NOT rename the .cpp file

//// ---------------------------------------------------------------------------
//// BEGIN: Fill your details as comments below DONT_ERASE_01_0
//// Name: Neeraj Patidar
////
//// END: Fill your details as comments above DONT_ERASE_01_0
//// ---------------------------------------------------------------------------

int main() {

   int number, max_cycles=10;
   int finalNumber, cycle_no=0;
   cout << "Enter a number " << endl;
   cin >> number;

//// ---------------------------------------------------------------------------
//// BEGIN: Write code below to check whether the number entered is a happy number or not (for max 10 cycles).  DONT_ERASE_02_01

    finalNumber=0;
    int a;
    while(cycle_no<max_cycles)
    {
        cycle_no++;
        while(number!=0)
        {
            a=number%10;
            finalNumber=finalNumber+a*a;
            number=number/10;
        }
        if(finalNumber==1)
            break;
        else
        {
            number=finalNumber;
            if(cycle_no!=10)
                finalNumber=0;
        }
    }

//// END: End of your code DONT_ERASE_02_01
//// ---------------------------------------------------------------------------

   if ( finalNumber == 1 )
      cout << "The number is a happy number. Detected after " << cycle_no << " cycles " <<endl;
   else
      cout << "Could not establish the fact that the number entered by the user is a happy number or not. The number obtained in " << cycle_no << " cycles is " << finalNumber << endl;

   return 0;
}