相关疑难解决方法(0)

C++编译器(特别是g ++)可以重新排序结构的内部元素吗？

我看到一些奇怪的行为,我有一个包含如下内容的结构:

Struct SomeStruct{
   ...
   ...
   long someLong;
   long someLongArray[25];
   unsigned long someUnsignedLong;
   unsigned long someUnsignedLongArray[8];
   unsigned long int someUnsignedLongInt;
   ...
   ...
};

当我写输出这个到文件,顺序someUnsignedLongArray和someLongArray似乎被反转(即,在元件someLongArray []出现之后someUnsignedLong和的元素someUnsignedLongArray []后出现someLong).这可能吗？？

谢谢

更新:根据要求,我使用以下内容写出结构:

int fd = open(fspec,O_RDWR|O_CREAT|O_TRUNC,0666);
int writeRes =  write(fd,(char *)&someStruct,sizeof(SomeStruct));

为了完整性,这里是完整的结构:

struct SomeStruct{
byte someByte;
byte someByteArray[6];
char someChar;
char someCharArray[5];
char someCharArrayArray[3][5];
short someShort;
signed short someShortArray[2];
unsigned short someUnsignedShort;
unsigned short someUnsignedShortArray[8];
int someInt;
int someIntArray[3];
int someIntArrayArrayArrayArray[4][3][2][6]; …