控制台输出线程 [英] Console output from thread

问题描述

我刚刚开始使用线程体验，无法获得一些基础知识。我怎么能写到控制台从线程与间隔说10毫秒？所以我有一个线程类：

I've just started experiencing with thread and can't get some basics. How can i write to Console from thread with interval say 10 msec? So i have a thread class:

public ref class SecThr
{
public:
    DateTime^ dt;
    void getdate()
    {
        dt= DateTime::Now; 
        Console::WriteLine(dt->Hour+":"+dt->Minute+":"+dt->Second); 
    }
};

int main()
{
    Console::WriteLine("Hello!");

    SecThr^ thrcl=gcnew SecThr;
    Thread^ o1=gcnew Thread(gcnew ThreadStart(SecThr,&thrcl::getdate));
}

我无法在Visual c ++ 2010 c ++ cli中编译它，错误C3924，C2825，C2146

I cannot compile it in my Visual c++ 2010 c++ cli, get a lot of errors C3924, C2825, C2146

推荐答案

最明显的错误：

• 缺少使用命名空间指令类，例如System :: Threading，如果您没有完全编写System :: Threading :: Thread，则需要。


• 使用类型为DateTime的^ hat类型值，不会发出编译错误，


• 没有正确构造一个委托对象，第一个参数是目标对象，第二个参数是函数指针。

• missing using namespace directives for the classes you use, like System::Threading, required if you don't write System::Threading::Thread in full.
• using the ^ hat on value types like DateTime, not signaled as a compile error but very detrimental to program efficiency, it will cause the value to be boxed.
• not constructing a delegate object correctly, first argument is the target object, second argument is the function pointer.

使用命名空间System重写此工具：

Rewriting it so it works:

using namespace System;
using namespace System::Threading;

public ref class SecThr
{
    DateTime dt;
public:
    void getdate() {
        dt= DateTime::Now; 
        Console::WriteLine(dt.Hour + ":" + dt.Minute + ":" + dt.Second);
    }
};


int main(array<System::String ^> ^args)
{
    Console::WriteLine("Hello!");

    SecThr^ thrcl=gcnew SecThr;
    Thread^ o1=gcnew Thread(gcnew ThreadStart(thrcl, &SecThr::getdate));
    o1->Start();
    o1->Join();
    Console::ReadKey();
}

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