Concept of union
From: Birt (birta_at_imp.com)
Date: 05/30/04
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Date: Sun, 30 May 2004 17:41:49 GMT
Could someone help me understand the concept of union?
For example,
typedef union _LARGE_INTEGER
{
struct {
DWORD LowPart;
LONG HighPart;
};
LONGLONG QuadPart;
} LARGE_INTEGER, *PLARGE_INTEGER;
How does "union" work in general?
When to use it?
Why have to initialize a LARGE_INTEGER object like:
LARGE_INTEGER li = {2, 4};
instead of
LARGE_INTEGER li = 5;?
Thanks!
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