I am not getting the expected output while entering 10000 in this code. The problem is about converting decimal to binary

Question

I am not getting the expected output while entering 10000 in this code. This is the code
*decimal to binary*\

#include<iostream>
    using namespace std;

    int main() {
        int N,sum=0,pv=1,r;
        cin>>N;
        while(N>0){
            r=N%2;
            sum= sum + r*pv;
            N=N/2;
            pv=pv*10;
        }
        cout<<sum<<endl;
    }

Answer 1

You need to use unsigned long long int type modifier to get your expected output. The value of sum exceeds the limit of a common integer does somehow.

Just modify your declaration:

unsigned long long int N, sum = 0, pv, r;

Your code with the above modification:

Output:

10000
10011100010000

And you're good to go!