#include <iostream>

using namespace std;

class Foo
{
public:
  Foo ( void );
  ~Foo ( void );
  void SetVar ( int var );  //遵循1
private:
  int a;
};
Foo::Foo ( void )
{
  a = 0;
}
Foo::~Foo ( void )
{
}
void Foo::SetVar ( int var )
{
  a = var;
}

int main ( void )
{
  Foo thef;

  thef.SetVar ( 2 );

  return ( 0 );
}