#ifndef GLOBALVARIABLE_H

 #define GLOBALVARIABLE_H

 #include <QImage>

 //全局变量

 class GlobalVariable

 {

 public:

     //图像变量

     static   QImage     GV_QImage;

 };

 #include "XXXXX.h"

 #include <QApplication>

 int main(int argc, char *argv[])

 {

     QApplication a(argc, argv);

     JaiCamera w;

     w.show();

     return a.exec();

 }

 //全局变量初始化

 QImage   GlobalVariable::GV_QImage;

GlobalVariable::GV_QImage = XXXXXX;