Struct member alignment

Guest_imported · Jun 25, 2001

Dear Members,

I want to know if MS Visual C++ does word alignment on struct members by default or by compilation flag?

MSamoila · Jun 25, 2001

By default the MS Visual C++ does the 8 bytes struct alignment (when no compilation flag is used).
To change the default alignment you may use the

Code:

/Zp

or

Code:

/pack

flag (are the same). You also may use

Code:

#pragma pack

directive to override the project aligmnent rule for all struct declarations below

Code:

#pragma pack

line.

E.g.:

Code:

/Zp1

#pragma pack (1)

Marius Samoila
Brainbench MVP for Visual C++