Avg age of any no. of ppl while loop

 #include <iostream>

#include <cstdlib>

#include <ctime>

using namespace std;

int main()

{

    int age, totalppl = 0, ageTotal = 0;

    cout << "Enter First persons age or -1 to exit " << endl;

    cin >> age;

    while(age!=-1){

        ageTotal = age + ageTotal;

        totalppl = totalppl + 1; //Important

         cout << "Enter next persons age or -1 to exit: " << endl;

         cin >> age;

    }

    cout << "Total People Entered is: " << totalppl << endl;

    cout << "Average age is : " << ageTotal/totalppl << endl;

    return 0;

}