http://kor.i2p/books/The%20C%20Programming%20Language%20by%20K&R/chapter6.html
#include < stdio.h > #include < ctype.h > #include < string.h > #define MAXWORD 100
int getword(char *, int);
struct key *binsearch(char *, struct key *, int);
/* count C keywords; pointer version */
main()
{
char word[MAXWORD];
struct key *p;
while (getword(word, MAXWORD) !