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diff --git a/ch1/1-11_word-count.c b/ch1/1-11_word-count.c
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+++ b/ch1/1-11_word-count.c
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+#include <stdio.h>
+
+/* The C Programming Language, 2nd Edition
+ *
+ * Exercise 1-11: How would you test the word count program? What kinds of
+ * input are most likely to uncover bugs if there are any?
+ *
+ * Answer: New lines (such as those caused by wrapping text) are most likely to
+ * introduce erroneous word counts, as well as symbols that are strung together
+ * but don't create actual words.
+ */
+
+#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') {
+			state = OUT;
+		} else if (state == OUT) {
+			state = IN;
+			nw++;
+		}
+	}
+
+	printf("%d %d %d\n", nl, nw, nc);
+
+	return 0;
+}