多线程的创建与运行

关于多线程的使用无论是C、C++还是Java等其他语言都用的比较多以下以QT的C++为例创建并运行多线程；并测试是否多线程同时运行（成功标志为两个无序间隔输出）

头文件：

#ifndef THREAD_H#define THREAD_H#include <QThread>#include <iostream>class thread:public QThread{    Q_OBJECTpublic:    thread();    void setMessage(QString message);    void stop();    int flag = 0;protected:    void run();    void printMessage();    void printMessage1();private:    QString messageStr;    volatile bool stopped;};#endif // THREAD_H

源文件：

#include "thread.h"#include <QDebug>thread::thread(){}void thread::run(){    if(flag == 0)        printMessage();    else        printMessage1();}void thread::stop(){}void thread::setMessage(QString message){    messageStr = message;}void thread::printMessage(){    for(int i=5;i>0;i--){        qDebug()<<i;    }    qDebug()<<messageStr;}void thread::printMessage1(){    for(int i=5;i>0;i--){        qDebug()<<"g";    }    qDebug()<<messageStr;}

main文件：

#include "thread.h"int main(){    thread thread1;    thread thread2;    thread1.flag = 1;    thread2.flag = 0;    thread1.setMessage("A");    thread2.setMessage("B");    thread1.start();    thread2.start();    thread1.wait();    thread2.wait();}

运行成功标志：
5
4
g
3
g
2
g
1
g
“B”
g
“A”