. As the name suggests, they extend the class. A class continuation is another name. The class extension is commonly used to declare private methods and properties. You want the class extension to be visible to the @implementation, and not in the hea
1)单独编译StdAfx.cpp 2)编译所有(即按Ctrl+F7) 这时因为该模块没有包括预编译头文件“stdafx.h”的缘故.VC用一个stdafx.cpp包含头文件stdafx.h,然后在stdafx.h里包含大部分系统头文件,这样编译时VC就通过编译stdafx.cpp把大部分系统头文件预编译进来了,在Debug目录下有一个很大的文件*.pch,这里就存储了预编译信息.根据这个原理,如果这个pch损坏了或被删除了,系统重新编译时就会抱怨“cannot openprecompiled h
修改php.ini文件,已使php支持扩展的功能 [root@localhost imagick-2.2.2]# ./configure --with-php-config=/usr/local/php/bin/php-configchecking for grep that handles long lines and -e... /bin/grepchecking for egrep... /bin/grep -Echecking for a sed that does not trunca
fatal error C1083: Cannot open precompiled header file: 'Debug/xxoo.pch': No such file or directory 相信很多童鞋都遇到过这种问题,找不到pch文件,看这个描述肯定是与预编译头有问关系.(预编译头有神马作用就不说了,可以自己了解下).一般遇到上面的问题很有可能是拷贝工程的时候,把stdafx.h stdafx.cpp文件删除了,而此时你即使把这两个文件再加入工程还是会报上面的错误.要重现这个错误也很
About why inline member function should defined in the header file. It is legal to specify inline on both the declaration and the definition. But the keyword inline must be placed with the function definition body to make the function inline. Just pu
[Header File Dependencies] 什么时候可以用前置声明替代include? 1.当 declare/define pointer&reference 时. 2.当 declare static data member 时. 3.当 declare function 时. So,下面这段代码会被正常编译通过: #include <stdio.h> class Point; struct Square { Point *pt; Point &ref; sta
adb shell as root after device rooted once device rooted, we must perform "su" before we get root permission in adb shell,this is not convenient in some situations,so there have a method to get permission without perform "su". adb shel
http://stackoverflow.com/questions/5849457/using-namespace-in-c-headers http://stackoverflow.com/questions/5849457/using-namespace-in-c-headers 這篇有解釋 避免在 header用 using namespace, 以免header被其他人include後 造成Conflict n all our c++ courses, all the teachers
在Linux中使用vi命令编辑mysql_backup.sh时遇到下面提示信息 E325: ATTENTION Found a swap file by the name ".mysql_backup.sh.swp" owned by: root dated: Sat Apr 23 23:58:28 2016 file name: /mnt/resource/mysql_backup/mysql_backup.sh modi
http://www.cyberciti.biz/faq/linux-add-a-swap-file-howto/ Procedure To Add a Swap File Under Linux You need to use the dd command to create swap file. The mkswap command is used to set up a Linux swap area on a device or in a file. Step #1: Login as
终于跑起来了,含自定义 include .h 的c语言程序,超开心呀! header files contain prototypes for functions you define in a .c or .cpp/.cxx file (depending if you're using c or c++). You want to place #ifndef/#defines around your .h code so that if you include the same .h twi