VS2012的程序如何使用QT5构建交互界面

Widgets.h（记得包含你自己代码的头文件）
#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QPushButton>
#include <QLayout>

class Widget : public QWidget
{
    Q_OBJECT

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

private:
    QPushButton *runPushButton;
    QPushButton *exitPushButton;

private slots:
    void run();
};

#endif // WIDGET_H
Widget.cpp
#include "Widget.h"

Widget::Widget(QWidget *parent) :
    QWidget(parent)
{
    setWindowTitle("Title");

    // button
    runPushButton = new QPushButton("&Go");
    exitPushButton = new QPushButton("&Exit");

    // layout
    QHBoxLayout *hl = new QHBoxLayout;
    hl->addWidget(runPushButton);
    hl->addWidget(exitPushButton);

    setLayout(hl);

    // signals and slots
    connect(runPushButton, SIGNAL(clicked()), this, SLOT(run()));
    connect(exitPushButton, SIGNAL(clicked()), this, SLOT(close()));
}

void Widget::run()
{
    // run your c++ code
}
main.cpp
#include "Widget.h"
#include

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();

    return a.exec();
}
将你的要执行的代码放到Widget::run()中即可