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POreturning a word from getword using int; possible typo in binsearch
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copied!<p>I'm finally finishing K&R, but encountered yet another unclear code. Chapter 6.3/6.4</p> <ol> <li><p>Referring to getword. How can it return int and that is supposed to be a word. I understand that it returns word[0] which is the first letter. However in my opinion, if I wanted to return a word, I'd introduce something like char *getword. Am I right?<br> How is int able to indicate it is a word?</p></li> <li><p>Still about getword: Supposing I enter "in " and after space I push enter. getword reads 'i' as it is not a space, and isalpha so the first if is omitted. What happens then?</p></li> <li><p>I marked the line in binsearch. Don't You think it should be high = mid - 1; there?</p></li> </ol> <pre><code>int getword(char *word, int lim) { char *w = word; int c; while (isspace(c = getch())) {} if (c != EOF) { *w++ = c; } if (!isalpha(c)) { *w = '\0'; return c; } for ( ; --lim > 0; w++) { if (!isalnum(*w = getch())) { ungetch(*w); break; } } *w = '\0'; return word[0]; } </code></pre> <hr> <pre><code>/* binsearch: find word in tab[0]...tab[n-1] */ struct key *binsearch(char *word, struck key *tab, int n) { int cond; struct key *low = &tab[0]; struct key *high = &tab[n]; struct key *mid; while (low < high) { mid = low + (high-low) / 2; if ((cond = strcmp(word, mid->word)) < 0) high = mid; /* [3] */ else if (cond > 0) low = mid + 1; else return mid; } return NULL; } </code></pre>

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