Demonstrates the use of a simple C++ class

#include <iostream>
using namespace std;

class cl {
  int i; // private by default
public:
  int get_i();
  void put_i(int j);
};

int cl::get_i()
{
  return i;
}

void cl::put_i(int j)
{
  i = j;
}

int main()
{
  cl s;

  s.put_i(10);
  cout << s.get_i() <<endl;

  return 0;
}