自己用代码写成的界面，然后再加入一些代码，程序执行时没有错误，但是用Qt creator设计成的界面，再加入代码，虽然能编译成功，但是程序运行时出现段错误，各位大侠帮帮忙，下面是我的程序代码，用creator实现的
头文件
#ifndef GUOADC_H#define GUOADC_H#include <QtGui>#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <sys/stat.h>//#include <sys/ioctl.h>#include <sys/types.h>#include <errno.h>#include <fcntl.h>//#include <linux/fs.h>#include <string.h>#include <QWidget>namespace Ui { class GuoAdc;}class GuoAdc : public QWidget{ Q_OBJECTpublic: explicit GuoAdc(QWidget *parent = 0); ~GuoAdc();private: Ui::GuoAdc *ui;public: QSocketNotifier *notifier; QLineEdit *disLineEdit;private slots: void readadc_value();};#endif // GUOADC_Hcpp文件
#include "guoadc.h"#include "ui_guoadc.h"static int adc_fd;static char buffer[30];static int len;int value=-1;GuoAdc::GuoAdc(QWidget *parent) : QWidget(parent), ui(new Ui::GuoAdc) { adc_fd=open("/dev/adc",0); if(adc_fd<0) { perror("open adc device"); } ui->setupUi(this); notifier=new QSocketNotifier(adc_fd,QSocketNotifier::Read,this); connect(notifier,SIGNAL(activated(int)),this,SLOT(readadc_value())); }GuoAdc::~GuoAdc(){ delete ui;}void GuoAdc::readadc_value(){ len=read(adc_fd,buffer,sizeof buffer-1); if(len>0) { buffer[len]='\n'; sscanf(buffer,"%d",&value); } else { perror("read ADC Device"); } QString tempStr; disLineEdit->setText(tempStr.setNum(value));}
