Question

Write a cpp program to find the Perfect numbers in the range
Write a program to find the perfect numbers between a given range.
Input Format:

The first input contains an integer which denotes the starting number of the range

The second input contains an integer which denotes the ending number of the range

Answer 1

Answer:

#include <iostream>  

int main()

{

   int n,i=1,sum=0;

   cout << "Enter a number: ";

   cin >> n;

      while(i<n)

    {

      if(n%i==0)

      sum=sum+i;

      i++;  

     }

 

if(sum==n)

   cout << i << " is a perfect number\n";  

else

   cout << i << " is not a perfect number\n";  

return 0;

}

Answer 2

Answer:

#include<iostream>

main()

{

 int n1,n2,p=0;

 std::cin>>n1>>n2;

 for(int i=n1;i<=n2;i++)

 {

   for(int j=1;j<i;j++)

   {

     if(i%j==0)

       p+=j;

     else

       p+=0;

   }

   if(p==i)

   {

     std::cout<<p<<" ";

     p*=0;

   }

   else

     p*=0;

 }

}