OffsetOf getting wrong value
struct SSomeData {
char mcChar;
double mdDouble;
bool mbBool;
};
int main() {
using namespace std;
cout << "Offset of mbBool = " << offsetof(SSomeData, mbBool) << endl;
return 0;
}
This code returns 16. But if I try to add double and char that should be 9. I don't get it. Why am I getting 16? size of double is 8 and size of char is 1. Where does 16 come from?
char mcChar;
double mdDouble;
bool mbBool;
};
int main() {
using namespace std;
cout << "Offset of mbBool = " << offsetof(SSomeData, mbBool) << endl;
return 0;
}
This code returns 16. But if I try to add double and char that should be 9. I don't get it. Why am I getting 16? size of double is 8 and size of char is 1. Where does 16 come from?
Last edited on
| OffsetOf getting wrong value |
Any time you find yourself saying something like this, you should rethink it. It obviously doesn't return the wrong value. It just returns a value that you didn't expect.
Your structure will be padded on most implementations.
See: http://www.drdobbs.com/cpp/padding-and-rearranging-structure-member/240007649
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