https://blog.youkuaiyun.com/zhoukaiyoungzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/zhoukaiyoung/article/details/107004798https://blog.youkuaiyun.com/zhoukaiyoung/article/details/107004798zhoukaiyoungSun, 28 Jun 2020 18:10:35 +0800https://blog.youkuaiyun.com/zhoukaiyoung/article/details/105728693https://blog.youkuaiyun.com/zhoukaiyoung/article/details/105728693zhoukaiyoungFri, 24 Apr 2020 13:07:55 +0800https://blog.youkuaiyun.com/zhoukaiyoung/article/details/104956464https://blog.youkuaiyun.com/zhoukaiyoung/article/details/104956464zhoukaiyoungWed, 18 Mar 2020 22:57:14 +0800https://blog.youkuaiyun.com/zhoukaiyoung/article/details/104953127https://blog.youkuaiyun.com/zhoukaiyoung/article/details/104953127zhoukaiyoungWed, 18 Mar 2020 20:44:13 +0800https://blog.youkuaiyun.com/zhoukaiyoung/article/details/104953065https://blog.youkuaiyun.com/zhoukaiyoung/article/details/104953065zhoukaiyoungWed, 18 Mar 2020 20:41:12 +0800https://blog.youkuaiyun.com/zhoukaiyoung/article/details/104896413https://blog.youkuaiyun.com/zhoukaiyoung/article/details/104896413zhoukaiyoungMon, 16 Mar 2020 12:18:55 +0800https://blog.youkuaiyun.com/zhoukaiyoung/article/details/104845873https://blog.youkuaiyun.com/zhoukaiyoung/article/details/104845873zhoukaiyoungFri, 13 Mar 2020 17:42:53 +0800https://blog.youkuaiyun.com/zhoukaiyoung/article/details/8058531https://blog.youkuaiyun.com/zhoukaiyoung/article/details/8058531zhoukaiyoungWed, 10 Oct 2012 23:46:18 +0800关键字sizeof (1)sizeof在计算变量所占空间大小时括号可以省略，比如 int i; sizeof i; 32位系统下结果是4 (2)在计算类型大小时括号不能省略，比如 sizeof int; 这样会报错，原因是int和sizeof都是关键字，int这个关键字前面可以加const 、unsigned等关键字，但是不 能加 sizeof,所以正确]]>https://blog.youkuaiyun.com/zhoukaiyoung/article/details/8058454https://blog.youkuaiyun.com/zhoukaiyoung/article/details/8058454zhoukaiyoungWed, 10 Oct 2012 23:32:39 +0800register       以前上大学时对它并没有什么印象，现在看看没想到这哥们还有这么个用法，作用是请求编译器尽可能将变量存在CPU内部寄存器中，而不是通过内存寻址访问，以提高效率。这个变量必须是能被CPU寄存器所接受的类型，也就是说这个变量必须是一个单一的值，不可以是结构体，它的长度必须是小于或者等于整型长度，因为这个变量不是在内存中，所以不能用取址运算符&来获取regi]]>