C/C++ code
//clock.h
#include<qapplication.h>
#include<qsound.h>
#include<qlabel.h>
#include<qdatetime.h>
#include<qstring.h>
#include<qnamespace.h>
#include<qfont.h>
#include<qtimer.h>
#include<qpushbutton.h>
#include<qvbox.h>
#include<qhbox.h>
#include<qlineedit.h>
#include<sys/ioctl.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<fcntl.h>
#include<unistd.h>
#include<stdio.h>
#include<stdlib.h>
class Clock:public QWidget
{
Q_OBJECT
public:
Clock(QWidget *parent=0,const char *name=0);
public slots:
void rePaintTime();
void setBeepTime();
void beep();
signals:
void timeOut();
private:
QTime nowTime;
QString time;
QLabel *label;
QString beepTime;
QLineEdit *textTime;
};
//clock.cpp
#include"clock.h"
Clock::Clock(QWidget *parent,const char *name):QWidget(parent,name)
{
QVBox *vBox = new QVBox(this);
QHBox *hBox = new QHBox(vBox);
(void) new QLabel("Your Waik Time :",hBox);
textTime = new QLineEdit(hBox);
QPushButton *submit = new QPushButton("Submit",hBox);
connect(submit,SIGNAL(clicked()),this,SLOT(setBeepTime()));
label = new QLabel("",vBox);
QTimer *timer = new QTimer(this);
connect(timer,SIGNAL(timeout()),this,SLOT(rePaintTime()));
label->resize(100,100);
label->setFont(QFont("Times",18,QFont::Bold));
nowTime = QTime::currentTime();
time = nowTime.toString();
label->setText(time);
timer->start(1000,FALSE);
connect(this,SIGNAL(timeOut()),this,SLOT(beep()));
}
void Clock::rePaintTime()
{
nowTime = QTime::currentTime();
time = nowTime.toString();
if(time == beepTime) emit timeOut();
label->setText(time);
}
void Clock::setBeepTime()
{
beepTime = textTime->text();
}
void Clock::beep()
{
int fd;
fd = open("/dev/beeps",0);
if(fd < 0)
{
printf("Open /dev/beeps Failed\n");
exit(1);
}
ioctl(fd,0,0);
close(fd);
}
//main.cpp
#include"clock.h"
int main(int argc,char **argv)
{
QApplication app(argc,argv);
Clock clock;
app.setMainWidget(&clock);
clock.show();
return app.exec();
}
程序的功能是一个简易的闹钟，读取系统时间，然后设置一个时间，时间一到就打开蜂鸣器。
窗口运行正常，但是，一旦运行beep()后就出现was terminated due to signal code SIGILL然后退出，但是蜂鸣器确实响了。我知道这是使用了非法地址出现的错误，但是我找不到我哪里非法了。在调用beep()以前运行正常。
求解
