#include <iomanip>
#include <iostream>
using namespace std;

int main()
{
  int age1 = 19;
  int age2 = 21;
  int age3 = 31;
  double averageAge;

  averageAge = (age1 + age2 + age3) / 3.0; // 23.66666...

  cout.setf(ios::fixed); // without the |ios::showpoint
  cout << setprecision(0);
  cout << "The average of three ages is " << averageAge << endl;
}