QT:multiple definition of错误？？？？？？？？

gogobox

QT:multiple definition of错误？？？？？？？？ [复制链接]

源码：tem.h中定义Tem类
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
class Tem : public QWidget
{
   Q_OBJECT    ／／请关注此处
public:
    Tem(QWidget * parent=0, Qt::WFlags fl=0);
    ~Tem(){};
private slots: ／／请关注此处
    void readTem();
private:
    int fd ;
    unsigned int tmp;
    QTimer * t;
    QLabel * label1;
    QLabel * label2;
    QLabel * label3;
    QLabel * label4;
    QLabel * label5;
    QLabel * label6;
    QComboBox * box1;
    QComboBox * box2;
    QPushButton * button1;
    QPushButton * button2;
};

Tem::Tem(QWidget * parent, Qt::WFlags fl):QWidget(parent, fl)
{
   setWindowTitle("温度测控");
   setGeometry(10,40,220,140);
   
   label1= new QLabel("当前温度:");
   label2= new QLabel("warning ");
   label3= new QLabel("上限:");
   label4= new QLabel("下限:");
   label5= new QLabel("报警开关:");
   label6= new QLabel;
   box1 =new QComboBox;
   box1->addItem("28", 28);
   box1->addItem("25", 25);
   box2= new QComboBox;
   box2->addItem("12", 12);
   box2->addItem("14", 14);
   button1= new QPushButton("报警:");
   button2= new QPushButton("停止:");
   
   QHBoxLayout * h1= new QHBoxLayout;
   QHBoxLayout * h2= new QHBoxLayout;
   QHBoxLayout * h3= new QHBoxLayout;
   QHBoxLayout * h4= new QHBoxLayout;
   QHBoxLayout * h5= new QHBoxLayout;
   h1->addWidget(label1);
   h1->addWidget(label6);
   h2->addWidget(label2);
   h3->addWidget(label3);
   h3->addWidget(box1);
   h4->addWidget(label4);
   h4->addWidget(box2);
   h5->addWidget(label5);
   h5->addWidget(button1);
   h5->addWidget(button2);
   QVBoxLayout * v= new QVBoxLayout;
   v->addLayout(h1);
   v->addLayout(h2);
   v->addLayout(h3);
   v->addLayout(h4);
   v->addLayout(h5);

   setLayout(v);
/*  fd = open("/dev/18b20", 0);
      if(fd < 0)
    {
        perror("Can't open /dev/18b20 \n");
        exit(1);
    }
    printf("open ds18b20 success \n");*/

  // t= new QTimer(this);
  // connect(t, SIGNAL(timeout()), this, SLOT(readTem()));
  // t->start(3000);
}

void Tem::readTem()
{
        read(fd, &tmp , sizeof(int));
        printf("the currently temperature is %d \n",tmp);
        label6->setText((char *)tmp);
  
}


编译的错误信息如下；
moc_tem.o(.text+0x0): In function `Tem::Tem(QWidget*, QFlags)':
: multiple definition of `Tem::Tem(QWidget*, QFlags)'
main.o(.text+0x0): first defined here
moc_tem.o(.text+0x1320): In function `Tem::Tem(QWidget*, QFlags)':
: multiple definition of `Tem::Tem(QWidget*, QFlags)'
main.o(.text+0x1320): first defined here
moc_tem.o(.text+0x2640): In function `Tem::readTem()':
: multiple definition of `Tem::readTem()'
main.o(.text+0x2640): first defined here
collect2: ld returned 1 exit status
make: *** [tem] 错误 1
当去掉代码中注释行后，可编译成功

2002xiao

极可能是头文件的互相包含引用造成的。

mrmt00

删除一下上次生成的.o文件试试看