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Why does C++ need a separate header file?
I've never really understood why C++ needs a separate header file with the same functions as in the .cpp file. It makes creating classes and refactoring them very difficult, and it adds unnecessary files to the project. And then there is the problem with having to include header files, but having to...
Meaning of $? (dollar question mark) in shell scripts
What does
8 Answers
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Why use symbols as hash keys in Ruby?
A lot of times people use symbols as keys in a Ruby hash.
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How to forward declare a template class in namespace std?
and used that function in my main. I get errors. Of course, I know that there are more template params for std::list (allocator I think). But, that is beside the point. Do I have to know the full template declaration of a template class to be able to forward declare it?
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How to Customize the time format for Python logging?
I am new to Python's logging package and plan to use it for my project. I would like to customize the time format to my taste. Here is a short code I copied from a tutorial:
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How to printf uint64_t? Fails with: “spurious trailing ‘%’ in format”
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The ISO C99 standard specifies that these macros must only be defined if explicitly requested.
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
... now PRIu64 will work
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ZeroMQ实例-使用ZMQ(ZeroMQ)进行局域网内网络通信 - C/C++ - 清泛网 - 专注C/C++及内核技术
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步骤如下：
1）下载zeromq的源代码，ZeroMQ的官方网址：http://zeromq.org/
百度网盘的下载地址 ： http://pan.baidu.com/s/1mg61em0
ZMQ API 的 百度网盘 下载地址 ： http://pan.baidu.com/s/1jGDqXfS
注：在本文写作时，ZMQ版本已经升级...
string.charAt(x) or string[x]?
Is there any reason I should use string.charAt(x) instead of the bracket notation string[x] ?
6 Answers
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Compiler error: memset was not declared in this scope
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You should include <string.h> (or its C++ equivalent, <cstring>).
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Remove secure warnings (_CRT_SECURE_NO_WARNINGS) from projects by default in Visual Studio
Is there a way to set by default for all projects removing the precompiler secure warnings that come up when using functions like scanf(). I found that you can do it by adding a line in the project option or a #define _CRT_SECURE_NO_WARNINGS in the beginning of the code.
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