C 語言:關於 sizeof 及結構及同位的記憶體對齊

#include <iostream.h>2#pragma pack(8)3struct example1 {4    short a;5    long b;6};7struct example2 {8    char c;9    example1 struct1;10    short e;11};12#pragma pack()13 14int main(int argc, char* argv[])15{16    example2 struct2;17    cout << sizeof(example1) << endl;18    cout << sizeof(example2) << endl;19    cout << (unsigned int)(&struct2.struct1) - (unsigned int)(&struct2) << endl;20    return 0;21}