Thread: How do i make my readline function accept empty input?

Hi all, title. Basically this is my readline

Code:

int read_line(char str[], int n){
  int ch, i = 0;


  while (isspace(ch = getchar()))
    ;
  while (ch != '\n' && ch != EOF) {
    if (i < n)
      str[i++] = ch;
    ch = getchar();
  }
  str[i] = '\0';
  return i;
}

and this is my main code

Code:

printf("Enter word: ");        read_line(word_str,MAX_LEN);
        if (word_str[0] == '\0')
            break;

I need to trigger the break when the user makes an empty input. E.g. after entering a word, when program prints "Enter word" again the user just hits enter. But currently for my program what happens is that enter just goes to the next line until i actually input a character/string. Thank you all for the help.

Originally Posted by Salem

> while (isspace(ch = getchar()))
> ;
> while (ch != '\n' && ch != EOF) {
The problem is that isspace('\n') is true, so you're not getting out of the first loop by typing a blank line.
isspace - C++ Reference

Thank you for the help sir! Fixed ))