pragma pack and inheritance

  • Thread starter Thread starter Mike Margerum
  • Start date Start date
M

Mike Margerum

I seem to be running into an issue where I am deriving a new class from
a struct with a different alignemnt via the pragma pack


#pragma pack(1)
typedef struct
{
unsigned short a;
unsigned int b;
} MyBase;
#pragma pack()

class CDerived : public MyBase
{
public:
unsigned short c;
void SetData(unsigned int& u)
{
u = 123;
}
};



If i instantiate a CDerived class and call the SetData method with the b
attribute, i get a data abort in the debugger.

CDerived d;
d.SetData(b);

Why doesnt this work? I am running visual studio 2005 and am targeting
pocket pc 2003 SDK
 
sorry wrong group. i posted to the evc forum. it's only happening when
targeting the ppc2003 sdk in vc 2005
 
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