我在qt3.3.3里:
#include <stdio.h>
#include <stdlib.h>
#include <iostream.h>
1        cout<<"Hello, let's plot !"<<endl;
2     QString     strOpenFile;
       QFile file(strOpenFile);
       cout<<strOpenFile<<endl;
       temp = file.size();
       cout<<temp<<endl;
都有结果:
1 Hello, let's plot !
2 /data3/chenxh/haozj/Qt/plot/drawline/accum.txt
  10750