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diff --git a/ch1/1-12_one-word-per-line.c b/ch1/1-12_one-word-per-line.c
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+#include <stdio.h>
+
+/* The C Programming Language, 2nd Edition
+ *
+ * Exercise 1-12: Write a program that prints its input one word per line.
+ *
+ * Answer: Be sure to output letters when you're in a word, and a newline when
+ * you're out of one.
+ */
+
+#define IN 1
+#define OUT 0
+
+int main(void) {
+ int c, nl, nw, nc, state;
+ state = OUT;
+ nl = nw = nc = 0;
+
+ while ((c = getchar()) != EOF) {
+ nc++;
+ if (c == '\n') {
+ nl++;
+ }
+ if (c == ' ' || c == '\n' || c == '\t') {
+ if (state == IN) {
+ state = OUT;
+ putchar('\n');
+ }
+ } else if (state == OUT) {
+ state = IN;
+ nw++;
+ }
+ if (state == IN) {
+ putchar(c);
+ }
+ }
+
+ printf("%d %d %d\n", nl, nw, nc);
+
+ return 0;
+}