fortheday

const int i = 3;
const_cast<int&>(i) = 4;

fortheday

class CBase
{
public:
	virtual void Print() = 0; // pure virtual, abstract
};

class CDerived0 : public CBase
{
public:
	CDerived0() { puts("new0"); }

fortheday

class CCar
{
	class CWheel *pWheels[4]; // inline forward declaration
};

fortheday

int *i1 = new int;  // 초기화안됨
int *i2 = new int();// 됨
int i3 = int();     // 됨
int i4(0);          // 됨
int i5{0};          // 됨
int i6();           // 컴파일에러
cout << *i1 << ' ' << *i2 << ' '<< i3 << ' ' << i4 << ' ' << i5 << endl;

char *pArr1 = new char[10];   // 초기화안함
char *pArr2 = new char[10](); // '\0' 으로 초기화

fortheday

enum class EDay { Mon, Tue, Web, Thu, Fri, Sat, Sun };
EDay day = EDay::Mon;

fortheday

unsigned char b = 0b1010; // 10
int i = 1'000'000;

fortheday

thread_local int tls_ThreadID;
__declspec(thread) int tls_ThreadID_Old;

fortheday

int x = 2;

constexpr int GetDays() { return 2018 * 365; }

constexpr int todayDays1 = GetDays() * 1; // OK
constexpr int todayDays2 = GetDays() * x; // CompileTime Error

const int todayDays = GetDays() * x; // OK, Runtime initialize

fortheday

using byte = unsigned char; // typedef unsigned char byte;
byte bByte = 0xFF;

fortheday

namespace Level0
{
	namespace Level1
	{
		int e_Year = 2018;
	}

	inline namespace Group1
	{
		int e_Month = 1;