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Why is argc not a constant?

As Effective C++ Item#3 states "Use const whenever possible", I start thinking "why not make these 'constant' parameters const "?. ...
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What is an unsigned char?

In C/C++, what an unsigned char is used for? How is it different from a regular char ? 17 Answers ...
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What is the difference between a map and a dictionary?

... Two terms for the same thing: "Map" is used by Java, C++ "Dictionary" is used by .Net, Python "Associative array" is used by PHP "Map" is the correct mathematical term, but it is avoided because it has a separate meaning in functional programming. Some languages use still ot...
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How to make an ImageView with rounded corners?

... It takes nearly 0.03 second to do that for a 200*200 picture, so I do think that's not best solution. – LiangWang Aug 7 '13 at 20:56 2 ...
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Using G++ to compile multiple .cpp and .h files

I've just inherited some C++ code that was written poorly with one cpp file which contained the main and a bunch of other functions. There are also .h files that contain classes and their function definitions. ...
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智能手机图形解锁有多少种可能 - 创意 - 清泛网 - 专注C/C++及内核技术

...。 下面的答案来自果壳Matrix67,这人的人网站也错,http://www.matrix67.com/ Android 的密码是 3 × 3 点阵中的一条路径,这条路径可以交叉,可以“走日字”,几乎是无所能(只要经过重复点),但却有一例外:...
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C语言判断文件是否存在 - C/C++ - 清泛网 - 专注C/C++及内核技术

...数为0时表示检查文件的存在性,如果文件存在,返回0,存在,返回-1。 这函数还可以检查其它文件属性: 06 检查读写权限 04 检查读权限 02 检查写权限 01 检查执行权限 00 检查文件的存在性 在...
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VS工程“生成事件”之文件拷贝 - C/C++ - 清泛网 - 专注C/C++及内核技术

...目录才能运行,如果有多编译版本需要拷贝多份,这样便于...有时工程下面引用了lib文件,但是编译Debug/Release等版本时需要将dll拷至指定目录才能运行, 如果有多编译版本需要拷贝多份,这样便于维护(config等配置文...
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MFC中主窗口和子窗口的菜单问题,如何统一显示MDI主窗体菜单? - C/C++ - ...

...用程序中,每一子窗体的菜单都显示在 MDI 窗体上,而是在子窗体本身。当子窗体有焦点时,该子窗体的菜单(如果有的话)就... 在 MDI 应用程序中,每一子窗体的菜单都显示在 MDI 窗体上,而是在子窗体本身...
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MFC AfxMessageBox改变标题的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...这标题,也就是我们的默认的工程名,我们应该怎么在改变工程名的基础上改变标题呢?其实这标题在...1、资源文件AFX_IDS_APP_TITLE(推荐): AfxMessageBox的标题,默认是工程名,那么怎么在改变工程名的基础上改变标题...