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C Question reading from and to files

3
Hello,

I am studying surveying and writing a program to help my needs. So far this program reads my input file and performs what i want by outputting it to another file. I then after displaying that information want to Re-read the same file into my while loop and perform some adjustment computations to it through Least Sqaures. The problem is when i try to reopen that file it will not work.

I have tryed fclose(in);
then reopening. didnt work.
and also i tryed rewind(in);
and it compiles but doesnt work.

How do i reopen this file and get data from it again without shooting this information to a whole new file?

thank you in advance.
Mar 5 '08 #1
3 1058
sicarie
4,677 Expert Mod 4TB
How big is the file? Can you hold it all in memory and manipulate it as you need to?
Mar 5 '08 #2
albs
3
the file contains about 500 traverse points. each including and elevation northing easting backsight and forsight. so the file isnt way to big.
Mar 5 '08 #3
JosAH
11,448 Expert 8TB
Can you show a bit of relevant code? Closing the file and reopening it again
should work.

kind regards,

Jos
Mar 5 '08 #4

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