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{
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};
struct MyStruct {
    char m1;
    double m4;
    int m3;
};
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#pragma pack(16)      //ÉèÖÃΪ16×Ö½Ú¶ÔÆë
struct test
{
   char m1;
   int m3;
   double m4;    
};
#pragma pack(pop)//»Ö¸´¶ÔÆë״̬
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struct MyStruct
{
    double dda1;
    char dda;
    int type
};
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