Question

Find the perfect numbers within a given number of range in c++

Answer 1

/*Perfect number is a positive number which sum of all positive divisors excluding

that number is equal to that number. For example 6 is perfect number since divisor of 6 are 1, 2 and 3.  

Sum of its divisor is 1 + 2+ 3 = 6*/

#include <stdio.h>

void  main(){

 int n,i,sum;

 int mn,mx;

 printf("Input the starting range or number : ");

 scanf("%d",&mn);

 printf("Input the ending range of number : ");

 scanf("%d",&mx);

 printf("The Perfect numbers within the given range : ");

 for(n=mn;n<=mx;n++){

   i=1;

   sum = 0;

   while(i<n){

     if(n%i==0)

          sum=sum+i;

         i++;

   }

   if(sum==n)

     printf("%d ",n);

 }

     printf("\n");

}