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https://www.tsingfun.com/it/cpp/1576.html 

截图软件截图区域以外背景变灰的实现--AlphaBlend - C/C++ - 清泛网 - 专注...

...--------画黑色背景---------------- COLORREF bgColor = RGB(0, 0, 0); char alpha = (255 * 30) / 100; int screenX = GetSystemMetrics(SM_CXSCREEN); int screenY = GetSystemMetrics(SM_CYSCREEN); CDC memdc; memdc.CreateCompatibleDC(&dc); CBitmap bmp, *pOldBitmap; bmp.CreateCompatibleBitmap(&...
https://www.tsingfun.com/it/cpp/1633.html 

Unicode and UTF-8 - C/C++ - 清泛网 - 专注C/C++及内核技术

...)、和ASCII码不兼容,而且不太好移植(Not Portable) 例如:char *s=“Good ,北京”;该C语言代码采用UTF-16编码后,字节序列中间有许多’\0’,’\0’ 会被识别为字符串的终止,strlen()函数不起用了。 2)、存储空间较大,...
https://www.tsingfun.com/it/cpp/1823.html 

Linux automake自动编译全攻略 - C/C++ - 清泛网 - 专注C/C++及内核技术

...st.c: #include <stdio.h> #include "lib/calc.h" int main(int argc, char** argv) { int sum = add(1, 2); printf("sum:%d\n", sum); return 0; } 编译及执行结果: 执行: 代码点此下载:automake.zip Linux automake 自动编...
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c/c++ volatile和mutable关键字 - C/C++ - 清泛网 - 专注C/C++及内核技术

...const,其某个成员也可以被修改。如: struct data { char name[30]; mutable int accesses; }; const data veep = {"hello", 0}; strcpy(veep.name, "hel"); //not allowed veep.accessess++; //allowed veep的const限定符进制程序修改veep的成员,但access成员的mut...
https://www.tsingfun.com/it/tech/2282.html 

window+nginx+php-cgi的php-cgi线程/子进程问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术

... /* Pre-fork, if required */ if (getenv("PHP_FCGI_CHILDREN")) { char * children_str = getenv("PHP_FCGI_CHILDREN"); ... So, php with fast-cgi will **never** work on Windows. The question is, why is forking disabled under windows? -------------https://bugs.php.net/bug.ph...
https://bbs.tsingfun.com/thread-491-1-1.html 

Linux automake自动编译全攻略 - 脚本技术 - 清泛IT社区,为创新赋能!

...nclude &lt;stdio.h&gt; #include &quot;lib/calc.h&quot; int main(int argc, char** argv) { &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;int sum = add(1, 2); &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;printf(&quot;sum:%d\n&quot;, sum); &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;r...
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C语言面试那些事儿──一道指针与数组问题 - c++1y / stl - 清泛IT社区,为创新赋能!

首先看如下代码: int main(int argc, char** argv) { &nbsp; &nbsp; int a[5] = {1,2,3,4,5}; &nbsp; &nbsp; int* ptr = (int*)(&amp;a + 1); &nbsp; &nbsp; printf(&quot;%d,%d\n&quot;, *(a+1), *(ptr-1)); &nbsp; &nbsp; return 0; }复制代码这道题在很多所谓经典C语言面试题里是常见...
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Unicode and UTF-8 - 综合 - 清泛IT论坛,有思想、有深度

...)、和ASCII码不兼容,而且不太好移植(Not Portable) 例如:char *s=“Good ,北京”;该C语言代码采用UTF-16编码后,字节序列中间有许多’\0’,’\0’ 会被识别为字符串的终止,strlen()函数不起用了。 2)、存储空间较大,造成存储及...
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【解决】double free or corruption (!prev) - C/C++ - 清泛网 - 专注C/C++及内核技术

...大小,在free的时候也会检测出来,报这个错误,如: char* buf = malloc(5); memcpy(buf, "123456", 6); free(buf); //free时报此错误 实际项目中可能此类问题没法直观定位到,推荐使用gcc自带的 asan 检查内存错误。 asan 内存跟踪
https://stackoverflow.com/ques... 

What's the difference between process.cwd() vs __dirname?

... js doc process.cwd() cwd is a method of global object process, returns a string value which is the current working directory of the Node.js process. As per node js doc __dirname The directory name of current script as a string value. __dirname is not actually a global but rather local to each mo...