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  1. #include <stdio.h>
  2.  
  3. int main()
  4. {
  5.     int n, i, sum = 0;
  6.  
  7.     printf("Enter a number: ");
  8.     scanf("%d", &n);
  9.  
  10.     for (i = 1; i < n; i++)
  11.     {
  12.         if (n % i == 0)
  13.         {
  14.             sum = sum + i;
  15.         }
  16.     }
  17.  
  18.     if (sum == n)
  19.         printf("%d is a Perfect Number.", n);
  20.     else
  21.         printf("%d is not a Perfect Number.", n);
  22.  
  23.     return 0;
  24. }
  25.  
  26.  
  27.  
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
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28
stdout
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Enter a number: 28 is a Perfect Number.
https://ideone.com/NXPcbj
language:
C (gcc 8.3)
created:
4 hours ago
visibility:
public

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