Question

I’m using the fgets function to read a line from a file. I don’t understand how to ignore the leading whitespace of a file though. I thought if I had a char array I could check the first value to see if it is whitespace with isspace, and then increment to the next value. My code looks like:

while (!feof(fp)) {
        fgets(str, LINE_SIZE, fp);
        while (isspace(*str)) {     // need help 
            str + 1;        // here
        }


        for (cp = str; cp = strtok(cp, "AEIOUaeiou\n"); cp = NULL) {
            puts(cp);
        }
    }
}

Thanks!

Answer 1

what you want is something like

while (!feof(fp)) {
        fgets(str, LINE_SIZE, fp);
        char * tmp = str; //use a temporary variable so str pointer isn't overwritten
        while (*tmp && isspace(*tmp)) {     // need help 
           tmp++;        // here
        }


        for (cp = tmp; cp = strtok(cp, "AEIOUaeiou\n"); cp = NULL) {
            puts(cp);
        }
    }
}