one/char.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53

#include <stdio.h>

#define IN 1 /* inside of a word */
#define OUT 0 /* outside of a word */

/* count lines, words, and characters */
void
wc()
{
	/*
	 * c must be big enough to hold any value getchar() returns so we use
	 * int instead of char to hold EOF, an integer defined in stdio
	 */
	int c, nl, nw, nc, state;
	state = OUT;
	nl = nw = nc = 0;
	while ((c = getchar()) != EOF) {
		++nc;
		if (c == '\n') {
			++nl;
		}
		/* && is higher precedence than || */
		if (c == ' ' || c == '\t' || c == '\n') {
			state = OUT;
		} else if (state == OUT) {
			state = IN;
			++nw;
		}
	}
	printf("%d %d %d\n", nl, nw, nc);
}

/* print input separated by new lines */
void
print_word_line()
{
	int c;
	while ((c = getchar()) != EOF) {
		if (c == ' ' || c == '\t' || c == '\n') {
			putchar('\n');
		} else {
			putchar(c);
		}
	}
}

int
main()
{
	wc();
	/* print_word_line(); */
	return 0;
}