Comma formatting

[copre22]

I'm having little trouble getting the numbers a user enters to be formatted appropriately. I can only use modolus and division for this im getting the first three number to show but cant seem to get the next numbers and also. I am having trouble on inputting the comma.

#include<iostream>



using namespace std;





int main ( int argc, char * argv[] ) 
{
	unsigned long long userInput;
	int answer;
	

	

	cout << "Enter a long long number: " << endl;
	cin >> userInput;
	
	answer = userInput /= 1000;

	
	answer %= 1000;


	cout << "Number: " << userInput << "," << answer << endl;


		
	system("pause");

	return 0;
}

[xkcd83]

What is the problem with the comma?
Are you asking about the program logic, or simply about the output statement?

[copre22]

At this point both, some guidance on how to approach it would be helpful.

#include<iostream>



using namespace std;




int main ( int argc, char * argv[] ) 
{
	unsigned long long userInput;
	int fthreeDigit;

	


	cout << "Enter a long long number: " << endl;
	cin >> userInput;


	fthreeDigit = ( userInput / 1000 );

	userInput %= 1000;
	

	cout << "Your Number: " << fthreeDigit << "," << userInput << endl;
	


	system("pause");

	return 0;
}