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为什么鸟哥说 int 再怎么随机也申请不到奇数地址
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鸟哥微博为什么要字节对齐需要字节对齐的根本原因在于CPU访问数据的效率问题。因为CPU每次都是从以4字节（32位CPU）或是8字节（64位CPU）的整数倍的内存地址中读进数据的。（更深入的原因，谁告知下），如果不对齐的话，很有可能一个4字节int需要分两次读取。具体演示看下面的实验。数据类型自身的对齐值按各数据类型自身大小进行对齐。变量的内存地址正好位于它长度的整数倍实验#include
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