#include <stdio.h> union test1; // declaration union test2 { // The definition of union test2 int a; } union test3 { // The test4 definition of type union test3 int b; } test4; declaration : 告訴 compiler 如何解讀 identifier, 及接受這個 reference of identifier…

A declaration introduces an identifier and describes its type, be it a type, object, or function. A declaration is what the compiler needs to accept references to that identifier. These are declarations: extern int bar; extern int g(int, int); double…

A declaration makes a name known to a programm. A definition creates the assocatied entity. A variable declaration specifies the variable type and name. In addition to specifying the variable type and name, a definition also allocates storage and may…

我新装的centos7主机无法使用里面自带的网卡,查询后发现网卡型号为BCM4312.我在看资料安装的过程中遇到了些问题,纠结了好久,现在分享下要注意的点,为后来的遇到同样问题的人提供点帮助.现在开始说正事: 若要安装以 Broadcom BCM4311.BCM4312.BCM4313.BCM4321.BCM4322.BCM43224.BCM43225.BCM43227 或 BCM43228 为基础的无线网络卡,请遵照以下的步骤: 第 1 步:辨认无线网络芯片及安装时依赖的组件 首先,请确定你是…

转自: http://blog.csdn.net/jimanyu/article/details/9697833 下面是具体的步骤 一:确定无线网卡的型号,驱动下载 第一步要确定机子的无线网卡型号是什么,可以用命令 [root@CentOS ~]$/sbin/lspci | grep Broadcom02:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 0…

官方文档:http://clang.llvm.org/docs/ClangFormatStyleOptions.html 中文 在代码中配置样式 当使用 clang::format::reformat(...) 方法, 格式将被clang::format::FormatStyle 框架指定. 配置格式化样式选项 这一部分列出了被支持的选项. 每个操作都有指定类型. 枚举类型的可能的值,被C++枚举(一个预编译,例如:LS_Auto)和配置中的一个值(没有预编译:Auto)指定. BasedOnS…

[注]本文是Declarations的翻译和注解版. https://msdn.microsoft.com/en-us/library/f432x8c6.aspx 1.声明: 我们通过声明往C++程序中引入(或重新引入)名字.Definitions are declarations that are sufficient to use the entity identified by the name(不知如何翻译,意思是定义也是一种声明).不同种类的实体其声明也是不同的,具体如下所示: 函数声…

1. Type conversion: If we assign an out-of-range value to an object of unsigned type, the result is the remainder of the value modulo the number of values the target type can hold. If we assign an out-of-range value to an object of signed type, the r…

链接:http://gcc.gnu.org/onlinedocs/gcc/Function-Names.html#Function-Names GCC provides three magic variables that hold the name of the current function, as a string. The first of these is __func__, which is part of the C99 standard: The identifier __fu…

from: http://wiki.centos.org/HowTos/Laptops/Wireless/Broadcom?action=show In order to install Broadcom BCM4311, BCM4312, BCM4313, BCM4321 or BCM4322, BCM43224, BCM43225, BCM43227, or BCM43228 based wireless network cards, the next steps should be fol…