问题描述
我知道这已经散列过一些时间，但我今天跟我握了握指针运算/数组索引的了解所遇到的情况。
I know this has been hashed over a number of time, but I have come across a case today that shook my understanding of the pointer math/ array index.
正如我永诺理解，和放大器; mybuff [10]和（安培; mybuff + 10）referancing相同的内存equivilent方式。
As I have allways understood it, &mybuff[10] and (&mybuff+10) are equivilent ways of referancing the same memory.
不过，我花了一上午的战斗，其中一个案例：
However I spent the morning fighting a case where:
memcpy(&mybuff+10,&in,8);
溢出缓冲区，当与优化的编译工作只是罚款编译调试时。
overflowed the buffer, when compiled with optimization on and worked just fine when compiled for debugging.
虽然athe同时
memcpy(&mybuff[10],&in,8);
在这两种情况下工作得很好。
worked just fine in both cases.
有任何意见或指针非常感谢。
Many thanks for any ideas or pointers.
推荐答案
http://cplusplus.com/doc/tutorial对于运营商的优先顺序/运营/ ＆放大器; mybuff + 10 如（安培; mybuff）+10 ＆放大器; mybuff [10] 如及（mybuff [10]）
see http://cplusplus.com/doc/tutorial/operators/ for priority order of operators &mybuff+10 like (&mybuff)+10 &mybuff[10] like &(mybuff[10])
修改
还有一些指针http://cplusplus.com/doc/tutorial/pointers/
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