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explicit template specialization cannot have a storage class

“虚拟列须有显式名称”? select a.name.........,a.x+b.y from a,b into temp tem_ab where'' 请问如何指定临时表的字段名称,如creat temp tem_ab( ) 会覆盖么?

by lnkamu - Informix - 2004-08-23 20:17:20 阅读(1161) 回复(2)

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Problem is how to implement the following: template<class T>; class t { T a_function(T x, T y) { // if T is class A // return function_for_A(x, y); // if T is class B // return function_for_B(x, y); } } Some libraries like BLAS/LAPACK use different function name for different data types doing the same thing (function_for_A and function_for_B in above), i.e...

by jehudi - C/C++ - 2005-04-11 09:03:41 阅读(945) 回复(4)

:) //CxxTst.cpp #include ; #include ; #include ; template <class Type>; class CMyData { public: Type Get() { Type t; pthread_mutex_lock(&lock); t = m_T; pthread_mutex_unlock(&lock); return t; } void Set(Type t) { pthread_mutex_lock(&lock); m_T = t; pthread_mutex_unlock(&lock); return; } public: CMyDat...

by whaa - Solaris - 2003-02-20 14:55:05 阅读(772) 回复(0)
by mygod - C/C++ - 2006-08-03 21:42:56 阅读(1217) 回复(3)

cannot create JDBC driver of class '' for connect URL 'null' 错误解决方案 在sever.xml中加context,若有错误,则tomcat不能启动,而单独文件配置时tomcat会忽略错误. 单独配置如下: JSP测试文件如下: test.jsp test Tomcat 本文来自ChinaUnix博客,如果查看原文请点:http://blog.chinaunix.net/u/17347/showart_140502.html

by ztk12 - Java文档中心 - 2006-07-14 10:29:55 阅读(819) 回复(0)

template <class T = Task> class My{ public: virtual T getsomething(); }; 这样的定义是否就是说只要Task或其子类都满足T类型的条件? 那么当实际的My的子类实现getsomething(),返回Task的子类myTask,外部调用my_child.getsomething()时,返回的是Task还是myTask?

by jchc - C/C++ - 2008-09-27 21:30:46 阅读(1620) 回复(3)

我的矩阵是这样定义的: [code] template <class Numeric, int rows, int cols> class Matrix { ... }; [/code] 如果要重载一个 * 运算符, 这个重载的运算符的声明该怎么写? 这样写对吗? [code] template <class Numeric, int rows, int cols> class Matrix { public: template Matrix& operator*(Matrix&); }; [/code] [ 本帖最后由 koolcoy 于 2007-10-18 12:...

by koolcoy - C/C++ - 2008-03-31 12:09:04 阅读(2341) 回复(2)
by stchlw - C/C++ - 2007-02-18 17:02:26 阅读(2616) 回复(3)

今天运行一个session程序,发现如下错误: cannot instantiate class: org.jnp.interfaces.NamingContextFactory [Root exception is java.lang.classNotFoundException: org.jnp.interfaces.NamingContextFactory] 解決方式: 在classpath內,加上%JBoss Home%\client\jbossall-client.jar 或者在: 首选项--java----已安装的jre ,编辑---查看是否添加了jobss中client中一些jar包如jbossall-client.jar,如果没有,可自已添加. 本文...

by gunny - Java文档中心 - 2008-12-09 13:41:19 阅读(1533) 回复(0)

org.apache.tomcat.dbcp.dbcp.SQLNestedException: cannot create JDBC driver of class '' for connect URL 'null' 这是怎么回事?急啊,请高手指点了。搞了好久了,解决不了,网上搜到的方法都用过了, 就是不行。

by wlcacc - Web开发 - 2007-09-27 15:40:21 阅读(2774) 回复(0)

我在调试jsp程序时,原来正常的程序突然出现下列错误: Internal Servlet Error: javax.servlet.ServletException: cannot create bean of class querydb.ConnDb at jsp.dailyreport._0002fjsp_0002fdailyreport_0002fsummary_0002ejspsummary_jsp_79._jspService(_0002fjsp_0002fdailyreport_0002fsummary_0002ejspsummary_jsp_79.java:82) at org.apache.jasper.runtime...

by full - Java - 2003-06-16 10:20:07 阅读(1402) 回复(0)