#ifdef
#define DEBUG 1
#ifdef DEBUG
cout<<"DEBUG";
#else
cout<<"RELEASE";
#endif
DEBUG
//#define DEBUG 1
#ifdef DEBUG
cout<<"DEBUG";
#else
cout<<"RELEASE";
#endif
RELEAES
#define DEBUG 1
#ifdef DEBUG
cout<<"DEBUG";
#else
cout<<"RELEASE";
#endif
DEBUG
//#define DEBUG 1
#ifdef DEBUG
cout<<"DEBUG";
#else
cout<<"RELEASE";
#endif
RELEAES