#include <QApplication>
#include <QPushButton>
int main(int argc,char *argv[])
{
QApplication app(argc, argv);
QPushButton *button=new QPushButton("Hello world!");
QObject::connect(button,SIGNAL(clicked()),&app,SLOT(quit()));
button->show;
return app.exec();
}
我就是先打开qt Creator ->file->new file or project 选择 empty qt project 工程名 hello
然后再在工程名右键Add New .. main.cpp 内容就是以上内容,在点build->run 就出现以上错误