need to find such as number within the given range that it should be a prime number   and also a happy number.       */   #include   #include   using namespace std;

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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We need to find such as number within the given range that it should be a prime number
  and also a happy number.
   
  */
  #include<iostream>
  #include<math.h>
  using namespace std;
  bool isHappy(int n)
  {
  int sum =0;
  while(n>0)
  {
  sum = sum + (n%10) * (n%10);
  n = n / 10;
  }
  if(sum==1)
  {
  returntrue;
  }
  elseif(sum==4) {
  returnfalse;
  }
  isHappy(sum);
  }
  bool isPrime(int n)
  {
  if(n==1)
  returnfalse;
  else{
  for(int i=2;i<=(int)sqrt(n);i++)
  {
  if(n%i == 0)
  returnfalse;
  }
 

returntrue;

 

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