Thread: print values of function to file

First up, declare your prototype correctly like this:
>>int count(void);
... this is different from the way you have it, and has a different meaning. The same goes for main():
>>int main(void)
[edit]Just noticed you have 2 prototype for count, you only need the one.

This is wrong:
>>scanf("%s", &filename);
it should be:
>>scanf("%s", filename);

I have restructured this section of code, not the location of the braces:

Code:

    if (datei == NULL)
    {
        printf("an error occured\n");
    }
    else
    {
        printf("an one dimensional array is going to be printed in your file\n\n");
        fputs(count(), datei); /* This is still wrong, as discussed below */
        fclose(datei);
    }

You need to fclose() your file too.

>>for(i=0;i<=100;i=i++)
This is exceeds the array bounds, remember it goes from 0 to 99. (Same for the return statement). And you've goofed with the part I've bolded.

Now, to fputs(), you are using the function incorrectly, its first arg is a char array, not an int like count() returns. Try this instead:

>>fprintf(datei, "%d", count());

This will only print out 1 element of the array. If you want all of them, you need to loop through it, outputing each one individually, like you have already done with the printf() statement in the count() function.

[edit]Darn, beat

Originally posted by threahdead
... but why is the number written to the file random, and not 0 or 99?

Are you still doing this at the end of count():
>return(hello[i]);

If so, i is out of the array bounds, so you'll be picking up junk memory. You must return (hello[i-1]); to get the last element of the array.