Segmental fault when using QValueVector

[luffy27]

I'm using Qt3.
The compelling process is OK, but when I run the application I have a segment fault(or segmental fault, I can't remember what is exactly called).
The code is below:

oridata.h

#ifndef ORIDATA_H 
#define ORIDATA_H 
 
#include <qnamespace.h> 
#include <qstring.h> 
#include <qvaluevector.h> 
 
class OriData; 
typedef QValueVector<OriData> OriDataVector; 
 
class OriData 
{ 
 
public: 
        OriData(double X=0.0, double Y=0.0) {m_X=X;  
           m_Y=Y;} 
private:  
        double m_X; 
        double m_Y; 
};

#ifndef ORIDATA_H 
#define ORIDATA_H 

#include <qnamespace.h> 
#include <qstring.h> 
#include <qvaluevector.h> 

class OriData; 
typedef QValueVector<OriData> OriDataVector; 

class OriData 
{ 

public: 
        OriData(double X=0.0, double Y=0.0) {m_X=X;  
           m_Y=Y;} 
private:  
        double m_X; 
        double m_Y; 
};

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mainwindow.h

#include "oridata.h" 
 
class MainWindow:public QMainWindow 
{          
public:  
       enum{MAX_ORIDATA=100}; 
       ........................... 
private: 
       ........................... 
       OriDataVector m_oriData; 
};

#include "oridata.h" 

class MainWindow:public QMainWindow 
{          
public:  
       enum{MAX_ORIDATA=100}; 
       ........................... 
private: 
       ........................... 
       OriDataVector m_oriData; 
};

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mainwindow.cpp

MainWindow::MainWindow(const QString &filename) 
           :QMainWindow(0,0,WDestructiveClose) 
{          
        ......................
        init(); 
        m_oriData.resize(MAX_ORIDATA); 
        ................... 
} 
 
void MainWindow::init() 
{ 
        .................................. 
        .................................. 
        textEdit = new QTextEdit(this,"textedit"); 
        textEdit->setTextFormat(Qt::PlainText); 
        textEdit->setFocus(); 
        this->setCentralWidget(textEdit); 
 
        QString str; 
        for(int i=0; i<MAX_ORIDATA; i++) 
        { 
                QString strX,strY; 
                double x = m_oriData[i].getX(); 
                double y = m_oriData[i].getY(); 
                strX = strX.setNum(x,'f'); 
                strY = strY.setNum(y,'f'); 
                strX = 'X'+strX; 
                strY = 'Y'+strY; 
                str  = strX+strY; 
                textEdit->append(str);
       }
}

MainWindow::MainWindow(const QString &filename) 
           :QMainWindow(0,0,WDestructiveClose) 
{          
        ......................
        init(); 
        m_oriData.resize(MAX_ORIDATA); 
        ................... 
} 

void MainWindow::init() 
{ 
        .................................. 
        .................................. 
        textEdit = new QTextEdit(this,"textedit"); 
        textEdit->setTextFormat(Qt::PlainText); 
        textEdit->setFocus(); 
        this->setCentralWidget(textEdit); 

        QString str; 
        for(int i=0; i<MAX_ORIDATA; i++) 
        { 
                QString strX,strY; 
                double x = m_oriData[i].getX(); 
                double y = m_oriData[i].getY(); 
                strX = strX.setNum(x,'f'); 
                strY = strY.setNum(y,'f'); 
                strX = 'X'+strX; 
                strY = 'Y'+strY; 
                str  = strX+strY; 
                textEdit->append(str);
       }
}

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I guess, the error maybe occurred in the MainWindow::init(), in the "for" circle, because when I comment out the "for" circle, the application runs OK without any error.

I'm a newbie please help me. Thanks a lot!

[jpn]

Swap these two lines:

m_oriData.resize(MAX_ORIDATA); // <-- resize the vector before
init(); // <-- the for loop which expects it to have size of MAX_ORIDATA

m_oriData.resize(MAX_ORIDATA); // <-- resize the vector before
init(); // <-- the for loop which expects it to have size of MAX_ORIDATA

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[luffy27]

Thanks jpn, that is correct.
Now it is Ok.