problem with my data

[dune911]

hi
i know how to print text in a file like xyz.txt
but there is one thing i am not sure about:

when i am going to print data like this in a file:

STR = 10
INT = 5
DEX = 12
...

how can i access this data again? i can read
the file, sure, but how can i "jump around"
in this file to find the data i am looking for ?

[Unregistered]

use fsetpos from stdio.h
thats all i know

bennyandthejets

[dune911]

thanks. i just found this in stdio.h

int	fgetpos	(FILE* fileGetPosition, fpos_t* pfpos);
int	fsetpos (FILE* fileSetPosition, fpos_t* pfpos);

but how can i use them?

[The Dog]

Well, if the data being written to the file is formatted,
ie. using fprintf(),
eg. A name, a surname and an age in each line,

Then i would suggest that you read in a whole line using
fscanf().

[dune911]

no, i want to use it like this :

for my game, i need random skills for the player.
i will put them into an extra file (like xyz.txt) to
be able to access this data when the program
runs another time. (like a savegame, you know?)

i have to access this data to use it for math functions
like "data in file (adress 1)" + "data in file (adress2)

[Hammer]

If the file contains struct's (read and written in binary mode), you can use the fsetpos() function to determine which struct you want to get. You know how many structs there are in the file in total, because you know the total file size, and the size of a single struct. Simple division tells you how many structs are in the file.

Alternativley, load the complete file into memory (into an array, or list of some kind), then access that instead of the file on disc.

[shaik786]

Or, is if it's a plain text file somthing like the .INI, then you probably have entries into this file like:
VAR1=val1
VAR2=val2
You can use fgets() to read each line and compare the first few characters with the 'VAR' you are looking for. If it is found, the value can be easily extracted which is on the right of this string.

fgets(line, sizeof(line), fp);
if(strncmp(line, "PLAYER", 6) == 0)
...

[dune911]

@shaik786
well, i think that's exactly what i am looking for