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C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++11 tuple 这一篇就够了tuple元组定义了一个有固定数目元素的容器,其中的每个元素类型都可以不相同,这与其他容器有着本质的区别 是对pair的泛化。首先来介绍元组的 tuple元组定义了一个有固定数目元素的容器,其中的每个元素...
C++/COM VARIANT实现二维数组 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++/COM VARIANT实现二维数组VARIANT变量是COM组件之间互相通信的重要的参数变量之一,它可以容纳多种不同的类型,如short、long、double等,包括各类指针和数组。组件...VARIANT变量是COM组件之间互相通信的重要的参数变量之一,它可...
std::string的截取字符串的方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
....0.1:8888");
int index = ip.find_last_of(':');
//ip
ip.substr(0, index).c_str();
//port
ip.substr(index + 1).c_str();
int find_first_of(char c, int start = 0):
查找字符串中第1个出现的c,由位置start开始。 如果有匹配,则返回匹配位置;否则,返回-1.默认情...
/usr/include/c++/4.9/bits/stl_iterator_base_types.h:165:53: error: ‘i...
/usr/include/c++/4.9/bits/stl_iterator_base_types.h:165:53: error: ‘int’ is not a class, struct, or union type先看下面的代码(来自:SO):#include <iostream>#include <cmath>#include <vector>using namespace std;double distance(int a, in...先看下面的代码(来自: SO):
#include <i...
MFC 获取当前时间的几种方法总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
MFC 获取当前时间的几种方法总结1.CTime类获取当前时间CTime curTime = CTime::GetCurrentTime();CString strCurTime;strCurTime.Format(_T("d d d d:d:d"), curTime...1.CTime类获取当前时间
CTime curTime = CTime::GetCurrentTime();
CString strCurTime;
strCurTime.Format(_T("d/d/...
ifstream 线程安全读文件 - C/C++ - 清泛网 - 专注C/C++及内核技术
...etline:std::istream& safeGetline(std::istream& is, std::string& t){ t clear(); 使用std::streambuf 函数 safeGetline:
std::istream& safeGetline(std::istream& is, std::string& t)
{
t.clear();
//这比使用std::istream逐个读取它们要快。
//以这种方式使...
c++11 std::call_once只调用一次函数,类似单例模式 - C/C++ - 清泛网 - 专...
c++11 std::call_once只调用一次函数,类似单例模式std_call_oncestd::call_once 保证函数或者一些代码段在并发或者多线程的情况下,始终只会被执行一次,Demo如下: include <iostream> include <thread>static std::once_flag g_once_flag std::call_once 保证...
SQL NVARCHAR and VARCHAR Limits
All, I have a large (unavoidable) dynamic SQL query. Due to the number of fields in the selection criteria the string containing the dynamic SQL is growing over 4000 chars. Now, I understand that there is a 4000 max set for NVARCHAR(MAX) , but looking at the executed SQL in Server Profiler for the ...
How Python web frameworks, WSGI and CGI fit together
I have a Bluehost account where I can run Python scripts as CGI. I guess it's the simplest CGI, because to run I have to define the following in .htaccess :
...
What is the difference between Digest and Basic Authentication?
What is the difference between Digest and Basic Authentication ?
4 Answers
4
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