strange struct size | GameDev.net

smokes · 2002-10-10T19:36:08+00:00

struct something { char number1; unsigned short number2; }; sizeof(something) = 4 why is this true? I mean a char is one byte and an unsigned short is a word, that is 2 bytes.. therefore the size should be 3 bytes.. but in Visual c++ 6 it is 4..

The compiler added in an extra byte for performance reasons.

If you want to prevent that, MSVC provides this way:

  
#pragma pack(push, 1)
struct something {
  ...
};
#pragma pack(pop)

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