#include <iostream>
#include <string>
using namespace std;
 
class person
{
public:
  string name;
  int age;
};
 
int main ()
{
  person a, b;
  a.name = "Calvin";
  b.name = "Hobbes";
  a.age = 30;
  b.age = 20;
  cout << a.name << ": " << a.age << endl;
  cout << b.name << ": " << b.age << endl;
  getchar();
  return 0;
}