124: Write a program in C++ to find the perfect numbers between starting and ending range using user defined functions. The perfect numbers between 1 to 500 are: 6 28 496. Make this program using user defined functions.

 

// Write a program in C++ to find the perfect numbers between starting and ending range using user defined functions.
// The perfect numbers between 1 to 500 are:
// 6
// 28
// 496

#include <iostream>
using namespace std;
int inum(string x);
bool isPerect_number(int x);
void Perfect_number_range(int x, int y);

int main()
{
    int start = inum("Enter starting number of range: "),
        end = inum("Enter the ending number of range: ");

    Perfect_number_range(start, end);

    return 0;
}

int inum(string x)
{
    int y;
    cout << x;
    cin >> y;
    return y;
}
bool isPerect_number(int x)
{
    int y = 0;
    for (int i = 1; i < x; i++)
    {
        if (x % i == 0)
        {
            y = y + i;
        }
    }
    if (y == x)
    {
        return true;
    }
    else
    {
        return false;
    }
}
void Perfect_number_range(int x, int y)
{
    for (int i = x; i <= y; i++)
    {
        if (isPerect_number(i))
        {
            cout << i << endl;
        }
    }
}


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