last_word

주의점

start, end 방식으로 잡아낸다.
start를 만드는 부분 중간에 str[i] == ‘\0’ 인지 검사하는 부분을 넣어준다.
c
```
while (str[i] == ' ' || str[i] == '\t')
		i++;
if (str[i] == '\0')
	  break ;
start = i;
```

문제

Assignment name  : last_word
Expected files   : last_word.c
Allowed functions: write
--------------------------------------------------------------------------------

Write a program that takes a string and displays its last word followed by a \n.

A word is a section of string delimited by spaces/tabs or by the start/end of
the string.

If the number of parameters is not 1, or there are no words, display a newline.

Example:

$> ./last_word "FOR PONY" | cat -e
PONY$
$> ./last_word "this        ...       is sparta, then again, maybe    not" | cat -e
not$
$> ./last_word "   " | cat -e
$
$> ./last_word "a" "b" | cat -e
$
$> ./last_word "  lorem,ipsum  " | cat -e
lorem,ipsum$
$>