file input output (tricky one)

[Guest_imported]

I hav a file called "data.dat" and I want to be able to find a certain line of text, then move to that line so i can work with it.....how would I search for and move to a certain line of text in a file??

 

[Seahaven]

Im not an expert but I think you need to tell us if data is written to the file in clear blocks say each line being separated by a return character.

Also do you know the line Number? if so then count the lines
in until you reach the required line or read in the lines until you find what you are looking for.

If its a binary file you may have to read the whole lot into memory.

Regards
Charles Winston

 

[atifmehdi]

the original stirng of some particular length say L1.


read the file in a buffer of L1.
Increment the counter to 1.i-e- first time read.
match the string. if same then k
else repeat the procedure

when the string is matched then use seekg(counter*L1), u'll reach the starting position of the string in the file.

wish u good luck.