Thread: Read a file into a loop program

Originally posted by TimeClock
1) I have seen many examples of how to read an external file but not sure how read a file in a loop program.
2) Do I read the file one record at a time or all records at one time?

1) The same way
2) Either.

Before you enter your loop, read a file to populate the variables that replace the hardcoded values, then close the file.

Once a day (mignight?), reread the file just in case the file has been updated with new values.

>> how I can read a text file and load each TOD value into a variable?<<
fgets()
sscanf()
http://www.rt.com/man
Have a go, and post again when you get stuck.

Originally posted by TimeClock
Thank you both Salem and Waltp for your responce. You've been very helpful. I've been out of town for a couple of weeks and just getting back to this program. Waltp, do you have an example of how I can read a text file and load each TOD value into a variable? I need to load the time in my file into each "alarm" variable is suppose. Thanks.

Sure, but you'll learn more if you try it yourself and if you get stuck, ask for help.

Code:

void readfromfileinaloop( FILE*fp )
{
    int c;
    if( (c=fgetc(fp)) == EOF )
    {
        printf("\nEnd of File\n");
        fflush(stdout);
        return;
    }
    printf("%c",c);
    readfromfileinaloop(fp);
}

Or did you want something useful?

Quzah.