cppisPerfectRange

#include <iostream>

bool isPerfect(int num)
{
    int sum{0};
    for (int div{ 1 }; div < num; ++div)
    {
        if (num % div == 0)
        {
            sum += div;
        }
    }
    return sum == num;
}

void printPerfectRange(int begin, int end)
{
    int copy;
    if (begin > end) { copy = begin; begin = end; end = copy; }
    for (; begin != end; ++begin)
    {
        if (isPerfect(begin)) { std::cout << begin << '\n'; }
    }
}

int main()
{
    printPerfectRange(1, 10000);
}