</p>
<pre>
#include <stdio.h>

int is_perfect(int number);

int main()
{
int i;

for (i = 1; i < 10000; i++)
if (is_perfect(i))
printf("%d ", i);
return 0;
}
/****************************************/
int is_perfect(int number)
{
int total = 0;
int i;

for (i = 1; i <= number / 2; i++)
if (number % i == 0)
total += i;
return total == number;
}

</pre>
<p>