Services
Technology Web App Development Mobile App Development Windows App Development Database Development UI/UX Development Cloud Development SEO Digital Marketing Guest Posting Content Writing Artificial Intelligence Data Science ERP Development CRM Development CMS Development LMS Development Business Listing Blockchain Technology Startup Promotion AI Tools Integration
Products
Data Converter Cleaner TUC - Unit Converter Import Export Survey Manager Tweet Controller
Developer
Article Blog Forum Interview Beginner News Startup Quiz
Users
Career
Apply Job Internship
Pricing
Login Sign Up Get a Quote

forum

Home Forums How do I write a program in C++ to find the perfect numbers between 1 and 500? – MindStick
Ask Question

1 Answers

Ravi Vishwakarma
Ravi Vishwakarma 12 Nov 2021
Report Abuse 
#include <iostream>
using namespace std;
void findPerfectNumber(int start, int end);
int isPerfectNumber(int num);
int main()
{
    findPerfectNumber(1,500);
    return 0;
}
void findPerfectNumber(int start, int end){
    for(int i = start; i<= end; i++){
        if(isPerfectNumber(i))
            cout<< i << ', ';
    }
    cout<<'\b\b ';
}
int isPerfectNumber(int num){
    int sum = 0;
    for(int i =1; i<=num/2;i++)
        if(num%i == 0)
            sum += i;
    return num == sum ? 1:0;
}

Output.

6, 28, 496  

What is perfect no.

perfect number, a positive integer that is equal to the sum of its proper divisors. The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128.
MindStick Training
Markdown for AI

A clean, structured version of this page for AI assistants and LLMs.

Open .md