[Tutor] Read and write from file

Isr Gish isrgish at fastem.com
Thu Aug 26 04:58:46 CEST 2004

   >What I really want to do is to read the first line, 1, then replace that
   >with something else, or remove it. Then read 2, and remove it, then read 3
   >and change it and so forth. How can I read, write and modify at the same
   >time? So far I have only been able to either read or write, but not both.

To do both you need to add a '+' to the mode ('r+' or 'w+'). If you do 'w+' it truncates the file to 0.

All the best,

   >Thanks in advance....
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