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Compiler Warning (level 4) C4820

  • Άρθρο

'bytes' bytes padding added after construct 'member_name'

The type and order of elements caused the compiler to add padding to the end of a struct. See align for more information on padding in a struct.

This warning is off by default. See Compiler Warnings That Are Off by Default for more information.

The following sample generates C4820:

// C4820.cpp
// compile with: /W4 /c
#pragma warning(default : 4820)

// Delete the following 4 lines to resolve.
__declspec(align(2)) struct MyStruct {
   char a;
   int i;   // C4820
};

// OK
#pragma pack(1)
__declspec(align(1)) struct MyStruct2 {
   char a;
   int i;
};