Runtime Error

[sophister]

Hi, I am confused by this problem. When I run my application, a Runtime Error occurs. The following is my main.cpp

#include "userDB.h"
#include "manager.h"
#include "user.h"
#include <QApplication>
#include <QTextCodec>
#include <QPixmap>
 
UserDB users;  //所有已经注册的用户
User currentUser;  //当前用户
QPixmap noDishImage;  //comment this line, it works fine
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QTextCodec::setCodecForTr(QTextCodec::codecForName("GB2312"));
    Manager w;
    w.show();
    return a.exec();
}

#include "userDB.h"
#include "manager.h"
#include "user.h"
#include <QApplication>
#include <QTextCodec>
#include <QPixmap>

UserDB users;  //所有已经注册的用户
User currentUser;  //当前用户
QPixmap noDishImage;  //comment this line, it works fine

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QTextCodec::setCodecForTr(QTextCodec::codecForName("GB2312"));
    Manager w;
    w.show();
    return a.exec();
}

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User and UserDB are two classes I write.
Why declaring global variables of my own classes the application works fine, while declaring a blobal variable of the QPixmap leads the application to crash??
Any ideas appreciated!!

[nish]

You can not declare any QPaintDevice(inherited by QPixmap,QWidget), without initializing QApplication first.

change QPixmap to QPixmap*;

#include <QApplication>
#include <QPixmap>
 
QPixmap* noDishImage; 
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    noDishImage=new QPixmap;
    return a.exec();
}

#include <QApplication>
#include <QPixmap>
 
QPixmap* noDishImage; 
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    noDishImage=new QPixmap;
    return a.exec();
}

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this should work

[nish]

btw .. what is that Chinese comment?

[sophister]

Yes, it works fine. And I have refer to the Qt doc.
谢谢！！

[sophister]

uh, my teammates and I are both Chinese, so we use Chinese to comment our code.
That two Chinese comments just tell a reader that what the two global variables are used for.

[nish]

and what u have written in your last post?

--->谢谢！！<---

[sophister]

It seems you have little knowledge of Chinese?
Well, 谢谢 means Thank you in English.

[nish]

i am from India... sadly they dont teach chinese there

here in taiwan its called Shiey-Shiey

[sophister]

You are from India?? you study in Taiwan now?

[nish]

I am Indian, i work in Hon Hai Precision Ind. (Foxconn), in Taiwan