我自定义了一个数据头文件
#ifndef DATA_H#define DATA_Hclass shuju{public: static int a;};#endif // DATA_H
但是在使用时候
#include "jiyi.h"#include "ui_jiyi.h"#include"data.h"Dialog::Dialog(QWidget *parent) : QDialog(parent), ui(new Ui::Dialog){ ui->setupUi(this);}Dialog::~Dialog(){ delete ui;}void Dialog::on_pushButton_clicked(){shuju sj;sj.a=1;}
总是报错，
collect2: ld returned 1 exit status
undefined reference to 'shuju::a'
