looping through **environ?

Someone provided me this sample code getting the **environ variable from the system and displaying it. It doesn't seem to work correctly. the body of the for-loop executes four times. I believe there is far more data available than that. Am I correct in that assumption? If so, why is this code not getting it all. It's been ages since I wrote any C/C++, and I was never fluent in these languages. I recall that working with pointers can be tricky. By the example on 58 of Ellis & Stroustrup I am lead to believe the code below should work. Any suggestions? #include #include #include "text_display.h" extern char **environ; unsigned int i; QObject *label; QString environString = "This is the process environment.\n"; int main( int argc, char ** argv ) { QApplication a( argc, argv ); textDisplayWidget *w = new textDisplayWidget; label = w->child("TextLabel"); for(i=0; i<(sizeof(environ)); i++) { environString.append("(QString)environ[i]"); environString.append("\n"); } ((QLabel*)label)->setText(environString); w->show(); a.connect( &a, SIGNAL( lastWindowClosed() ), &a, SLOT( quit() ) ); return a.exec(); }