QT入门（二）——使用命令行手写一个小窗口_如何写一个命令行窗口

#include <QApplication>
#include <QLabel> //标签
#include <QLineEdit> //文本行编辑
#include <QPushButton> //按钮
#include <QHBoxLayout> //水平布局
#include <QVBoxLayout> //垂直布局
#include <QWidget> //窗口
int main(int argc,char *argv[])
{
QApplication app(argc,argv);
QLabel *infoLabel = new QLabel;
QLabel *openLabel = new QLabel;
QLineEdit *cmdLineEdit = new QLineEdit;
QPushButton *commitButton = new QPushButton;
QPushButton *cancelButton = new QPushButton;
QPushButton *browseButton = new QPushButton;
infoLabel->setText("input cmd:");
openLabel->setText("open");
commitButton->setText("commit");
cancelButton->setText("cancel");
browseButton->setText("browse");
QHBoxLayout *CmdLayout = new QHBoxLayout; //水平布局对象
CmdLayout->addWidget(openLabel);
CmdLayout->addWidget(cmdLineEdit);
QHBoxLayout *buttonLayout = new QHBoxLayout;
buttonLayout->addWidget(commitButton);
buttonLayout->addWidget(cancelButton);
buttonLayout->addWidget(browseButton);
QVBoxLayout *mainLayout = new QVBoxLayout;
mainLayout->addWidget(infoLabel);
mainLayout->addLayout(CmdLayout);
mainLayout->addLayout(buttonLayout);
QWidget w;
w.setLayout(mainLayout);
w.setWindowTitle("running");
w.show(); 
return app.exec();//让程序一直运行，不结束，相当于while死循环 
}