启动一个线程

[thread.cpp]
#include
#include

#include "thread.h"

Thread::Thread()
{
    stopped = false;
}

void Thread::setMessage(const QString &message)
{
    messageStr = message;
}

void Thread::run()
{
    while (!stopped)
        ::system("mplayer /1.mp3"); 
    //  std::cerr << qPrintable(messageStr);
    stopped = false;
    std::cerr << std::endl;
}

void Thread::stop()
{
    stopped = true;
}

==================================================
[thread.h]
#ifndef THREAD_H
#define THREAD_H

#include

class Thread : public QThread
{
    Q_OBJECT

public:
    Thread();

    void setMessage(const QString &message);
    void stop();

protected:
    void run();

private:
    QString messageStr;
    volatile bool stopped;
};

#endif

==========================================================
::system(" kill -9 $(pidof mplayer)");