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-rw-r--r--ch1/wc.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/ch1/wc.c b/ch1/wc.c
new file mode 100644
index 0000000..4a5007d
--- /dev/null
+++ b/ch1/wc.c
@@ -0,0 +1,29 @@
+#include<stdio.h>
+
+#define IN 1 // inside a word
+#define OUT 0 // outside a word
+
+/*
+ * Count lines, words, and characters in input.
+ */
+main() {
+ 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);
+}