Thread: "I'm go-ing craaazy..." (fin input problems

I'm going crazy here..
I think I've gone so long staring at this that I don't see the obvois...so pls

here's the thing, i want to read a line from a (temp) file into a string

Code:

FILE *newNodes = fopen("new_nodes.tmp", "w+");
...
fputs(argv[1], newNodes);
...
char node[15];
...
fgets(node, 15, newNodes);
printf("value of node is %s", node);

the fputs works fine, i get the string i want stored in the file. i can compile and all, but the printf just prints the text, nothing else.
if i try what to me is just the same (with other names) in a test program it works fine, but not when it counts....

and im going to put and read more things in the file later, so don't just tell me to take the string directly from argv

/D

thanx...
that solved it.
but i think another problem may have occured, i'm not sure though cuz i haven't gotten that far yet.
this part of the program workes something like this:

Code:

while(!done){
read next item from the file
call functions with value taken from file
}

and these functions will add more stuff (lines) to the file. if i rewind the file within the loop, i'll just get the first line (right?).
if i understand things right i need to seek before i want to read every time, and seek for what i can tell will rewind a given number of BYTES, not lines. i know how many lines have been written, but not how many chars.
how do i do so that the next time the loop comes around to read the new line, it will get the line after the one it read the previos time.

one way might be to store the last read line somwhere, make a loop to read until it's read the line it had the last time (just with strcmp) and then read one more line, but this seems rather silly...

/D

thanx again, that seems like it would do the trick (for now atleast).

and why i used the file was because i don't know how much i'll data i have to store, and cuz i'm not very good with memory-managing