Guys,
Could someone tell me why the Progam Crashes. Here is the Code ...
Qt Code: 
  1. #include <qapplication.h>
  2. #include <qguardedptr.h>
  3. class Employee{
  4. public:
  5.     Employee( const QString& strName, int iSal ){
  6.         m_strName = strName;
  7.         m_iSalary = iSal;
  8.     }
  9.  
  10.     QString name() const {
  11.         return m_strName;
  12.     }
  13.     void setName( const QString& strName ){
  14.         m_strName = strName;
  15.     }
  16.  
  17.     int salary() const {
  18.         return m_iSalary;
  19.     }
  20.  
  21.     void setSalary( int iSal ) {
  22.         m_iSalary = iSal;
  23.     }
  24.  
  25.     operator QString() const {
  26.         return m_strName + ", " + QString::number( m_iSalary );
  27.     }
  28.  
  29. private:
  30.     QString m_strName;
  31.     int     m_iSalary;
  32. };
  33.  
  34.  
  35. int main(int iArgs, char* aszArgs[] ) {
  36.     QApplication app( iArgs, aszArgs );
  37.  
  38.     QMap< int, QGuardedPtr<Employee> > mapIdToEmployee;
  39.     mapIdToEmployee[ 0 ] =  new Employee( "Sunil", 6000 );  //Crashes ??
  40.  
  41.     if( ! mapIdToEmployee[0] ){
  42.         qWarning( "Employee Destroyed !!! " );
  43.     }
  44.     else{
  45.         qWarning(  ( static_cast<QString>(*mapIdToEmployee[0]) ).ascii() );
  46.     }
  47.     return  0;
  48. }
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