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Boost智能指针——shared_ptr - C/C++ - 清泛网 - 专注C/C++及内核技术

...thing\n&quot;; } }; void test() { boost::shared_ptr<implementation> sp1(new implementation()); std::cout<<&quot;The Sample now has &quot;<<sp1.use_count()<<&quot; references\n&quot;; boost::shared_ptr<implementation> sp2 = sp1; std::cout<<&quot;The Sample now has &quot;<<sp2.use_count()<<&quot; references\n&quot;; ...
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c++ Timer使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...提供实例参考。窗口应用程序使用Timer: #define TIMER_ID 1000 //定时器ID,可任意。触发后回调函数中用于区别不同的定时器以执行不同的任务 SetTimer(TIMER_ID, 1000 , NULL); //启动定时器,1秒后触发 KillTimer(TIMER_ID); //取消定时器 ...
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VC/Linux C++ 递归访问目录下所有文件 - C/C++ - 清泛网 - 专注C/C++及内核技术

...r = NULL; struct dirent* file = NULL; if (dirName[dirName.size()-1] != '/') { dirName += &quot;/&quot;; } if ((Dir = opendir(dirName.c_str())) == NULL) { cerr << &quot;Can't open Directory&quot; << endl; exit(1); } while (file = readdir(Dir)) { ...
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std::string截取字符串,截取ip:port - C/C++ - 清泛网 - 专注C/C++及内核技术

std::string截取字符串,截取ip:portstd::string ip(&quot;127.0.0.1:8888&quot;);int index = ip.find_last_of(':'); 获取ipip.substr(0, index).c_str(); 获取portip.substr(index + 1).c_str();std::string ip(&quot;127.0.0.1:8888&quot;); int index = ip.find_last_of(':'); // 获取ip ip.substr(0, index).c_str();...
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DoModal() 不显示的问题总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...结int nResponse = dlg.DoModal();对话框窗口不显示,返回值为-1。出现这种情况一般是.rc资源文件的问题导致。1、核对一下resource.h,本...int nResponse = dlg.DoModal();对话框窗口不显示,返回值为-1。 出现这种情况一般是.rc资源文件的问题...
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mfc spin control 用法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...此添加控件通知处理程序代码 if(pNMUpDown->iDelta == 1) // 如果此值为1 , 说明点击了Spin的往下箭头 {... } else if(pNMUpDown->iDelta == -1) // 如果此值为-1 , 说明点击了Spin的往上箭头 {... } ...
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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...

...------------- 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(&dc, screenX, screenY); pO...
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字符串指针变量与字符数组的区别 - C/C++ - 清泛网 - 专注C/C++及内核技术

...字符数组的区别使用字符串指针变量与字符数组的区别(1)分配内存  设有定义字符型指针变量与字符数组的语句如下:  char *pc ,str[100];  则系统...使用字符串指针变量与字符数组的区别 (1)分配内存   设有定义...
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c/c++浮点输出时,不显示小数点后没用的0 - C/C++ - 清泛网 - 专注C/C++及内核技术

...科学记数法还是一般的小数记数法。 例如: float f = 3.14; printf(&quot;%f\n&quot;, f); printf(&quot;%g\n&quot;, f); 不过要注意,若使用%g输出0.000000001(即浮点数的0,不理解的请参考《浮点数在内存中的表示》)时,它显示的是e-xxx科学计数的形...
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C++ ADO Excel中RecordSet.Open打开记录的两个参数adOpenKeyset、adLockBat...

...两个参数adOpenKeyset、adLockBatchOptimistic的详细说明:缺省值1 adLockReadOnly RecordSet...C++ ADO Excel中RecordSet.Open打开记录的两个参数adOpenKeyset、adLockBatchOptimistic的详细说明: 缺省值 1 adLockReadOnly RecordSet对象以只读方式启动...