I'm trying to learn to alter a line of text within a text file via a console app. So far I can open the file, read each line into a string, identify the text I'd like to alter & alter the string. I can also set the cursor to the position of the begining of the line I want to alter. but when I write to the file it always appends instead of overwriting the line.

This is the text in the file I'm working with:

red Code: 
  1. This is a text file for testing.

  2. I plan to use it to develop my fixPath program.

  3. I hope it works.
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What I'd like to do is remove the word "fixPath from the 2nd line.

Here is the code so far:

Qt Code: 
  1. #include <QtCore/QCoreApplication>
  2. #include <QTextStream>
  3. #include <QString>
  4. #include <QFile>
  5.  
  6. QTextStream cout(stdout, QIODevice::WriteOnly);
  7. QTextStream cerr(stderr, QIODevice::WriteOnly);
  8.  
  9. int main(int argc, char *argv[])
  10. {
  11.     QCoreApplication a(argc, argv);
  12.     QString str1, str2(" fixPath");
  13.     QFile file("fixPath.txt");
  14.  
  15.  
  16.     if(file.open(QIODevice::ReadWrite))
  17.     {
  18.         QTextStream fileStream(&file);
  19.         while (not fileStream.atEnd())
  20.         {
  21.           str1 = fileStream.readLine();
  22.           if (str1.contains(str2))
  23.           {
  24.               str1.remove(str2);
  25.               fileStream.seek(34);
  26.               fileStream.operator<<(str1);
  27.               cout << fileStream.pos()<<endl;
  28.           }
  29.         }
  30.         file.close();
  31.     }
  32.  
  33.     //return a.exec();
  34. }
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Any help is appreciated.

Ed