大约有 30,000 项符合查询结果(耗时:0.0256秒) [XML]

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How to get Time from DateTime format in SQL?

...AttDate as time) [time] FROM yourtable Earlier versions: SELECT convert(char(5), AttDate, 108) [time] FROM yourtable share | improve this answer | follow |...
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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

...是否存在用函数access,头文件是io.h,原型:int access(const char *filename, int amode);amode参数为0时表示检查文件的存在性,如果文件存...用函数access,头文件是io.h,原型: int access(const char *filename, int amode); amode参数为0时表示检查文...
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scoped_ptr 与 auto_ptr 与 shared_ptr 区别总结 - C/C++ - 清泛网 - 专注C/C++及内核技术

...cout<<p.use_count()<<"::"<<p.get()<<std::endl; } #include <algorithm> char upCase(char c) { return toupper(c); } int _tmain(int argc, _TCHAR* argv[]) { shared_ptr<Foo> sp1(new Foo()); shared_ptr<Foo> sp2(sp1); shared_ptr<Foo> sp3; sp1->print(); sp2->print(); std::cout<<sp1...
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半个汉字的校验与处理(C++) - C/C++ - 清泛网 - 专注C/C++及内核技术

... // strSrc: 原始字符串 // nMaxLen: 截断后的最大长度 char *GetTruncate(char *strSrc, int nMaxLen) { if (strSrc == NULL || nMaxLen == 0) { return NULL; } int len = strlen(strSrc); if (len == 0) { ...
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C++中判断文件、目录是否存在的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...种方式是直接调用c的函数库。 就是函数 int _access(const char* path,int mode); 这个函数的功能十分强大。 可以看看msdn的详细介绍 #include <io.h> #include <stdio.h> #include <stdlib.h> int main( void ) { // Check for existence. if( (_access( "c...
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vc/mfc *通配符 批量删除文件 - C/C++ - 清泛网 - 专注C/C++及内核技术

...tion函数:#include "stdafx.h"#include <windows.h>int _tmain(int argc, _TCHAR*...直接上代码,可直接运行亲测有效,使用SHFileOperation函数: #include "stdafx.h" #include <windows.h> int _tmain(int argc, _TCHAR* argv[]) { LPTSTR delFileName = L"c:/test/test*.txt"...
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C语言面试那些事儿──一道指针与数组问题 - C/C++ - 清泛网 - 专注C/C++及内核技术

...─一道指针与数组问题首先看如下代码:int main(int argc, char** argv){ int a[5] = {1,2,3,4,5}; int* ptr = (int*)(&a + 1); ...首先看如下代码: int main(int argc, char** argv) { int a[5] = {1,2,3,4,5}; int* ptr = (int*)(&a + 1); printf("%d,%d\n", *(a+1...
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error: ‘uint16_t’ does not name a type - C/C++ - 清泛网 - 专注C/C++及内核技术

...2012, 2013 MinGW.org project * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modif...
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error C2758: “ConstInit::cival”: 必须在构造函数基/成员初始值设定项列...

... int ival; const int cival; int &rival; }; int main(int argc, char *argv[]) { ConstInit ci; } 这里引用类型rival以及const类型cival都没有在初始化列表中初始化,因此报错。解决办法就是在初始化列表中初始化这些特殊的类成员。如下...
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Oracle nvarchar和varchar相互转换、联合查询 - 数据库(内核) - 清泛网 - ...

Oracle nvarchar和varchar相互转换、联合查询场景:联合查询(union all)Oracle两张表,同一组字段的数据类型不一致,分别是nvarchar和varchar。这时联合查询报错如下:ora12704:字...场景:联合查询(union all)Oracle两张表,同一组字段的...