QT下的QProcess调用外部程序

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
Q_OBJECT

public:
explicit Widget(QWidget *parent = 0);
~Widget();

private slots:
void on_submit_clicked();

private:
Ui::Widget *ui;
};

#endif // WIDGET_H

#include "widget.h"
#include "ui_widget.h"
#include <QProcess>

Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);
}

Widget::~Widget()
{
delete ui;
}

void Widget::on_submit_clicked()
{
QProcess *process = new QProcess;
QString startProgram = ui->lineEdit->text();
process->start(startProgram.trimmed());
　　process->close();
}