CDumpContext::operator <<

CDumpContext& operator <<(const CObject* pOb);
  throw(CFileException);
CDumpContext& operator <<(const CObject* Ob);
  throw(CFileException);
CDumpContext& operator <<(LPCTSTR lpsz);
  throw(CFileException);
CDumpContext& operator <<(const void* lp);
  throw(CFileException);
CDumpContext& operator <<(BYTE by);
  throw(CFileException);
CDumpContext& operator <<(WORD w);
  throw(CFileException);
CDumpContext& operator <<(DWORD dw);
  throw(CFileException);
CDumpContext& operator <<(int n);
  throw(CFileException);
CDumpContext& operator <<(double d);
  throw(CFileException);
CDumpContext& operator <<(float f);
  throw(CFileException);
CDumpContext& operator <<(LONG l);
  throw(CFileException);
CDumpContext& operator <<(UNIT u);
  throw(CFileException);
CDumpContext& operator <<(LPCWSTR lpsz);
  throw(CFileException);
CDumpContext& operator <<(LPCSTR lpsz);
  throw(CFileException);

返回值：
一个CDumpContext参考。使用返回值，可以在源代码的单行中写入多个插入点。

说明：
输出指定数据到堆上下文中。
CObject指针的装载插入操作符也适合于大多数原始类型。字符指针会产生字符串堆，void的指针将产生堆十六进制的地址。
如果在类实现过程中使用了IMPLEMTNT_DYNAMIC或IMPLEMTNT_SERIAL宏，CObject:: Dump将打印CObject派生类的名字，否则，它将打印CObject 。如果覆盖了Dump函数，那么就可以提供一个更有意义的对象内容输出，而不是一个十六进制的堆。

示例：
//example for CDumpContext::operator <<
extern CObList li;
CString s = "test";
int i = 7;
long lo = 1000000000L;
LONGLONG lolo = 12345678901234i64;
afxDump << "list=" << &li << "string="
        << s << "int=" << i << "long=" << lo << "LONGLONG=" << lolo << "\n";