Exercise 1-11. test the word count program

07-extra-blanks.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+
+int main()
+{
+	int c;
+	int l;
+
+	while ((c = getchar()) != EOF) {
+		if (c == ' ' && c == l) {
+			;
+		} else {
+			printf("%c", c);
+			l = c;
+		}
+	}
+}

08-unambiguous.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+int main()
+{
+	int c;
+
+	while ((c = getchar()) != EOF) {
+		if (c == '\t')
+			printf("\\t");
+		else if (c == '\b')
+			printf("\\b");
+		else if (c == '\\')
+			printf("\\\\");
+		else
+			printf("%c", c);
+	}
+}

09-word-count.c

@@ -0,0 +1,25 @@
+#include <stdio.h>
+
+#define IN  1
+#define OUT 0
+
+/* count lines, words, and characters in input */
+int 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);
+}

Makefile

@@ -1,22 +1,10 @@
-all: hello mathvars c2f input count countlines
+CC   = gcc
+OBJS = $(patsubst %.c,bin/%,$(wildcard *.c))
 
-hello: 01-hello-world.c
+all: $(OBJS)
-	gcc -o ./bin/01-helloworld 01-hello-world.c
 
-mathvars: 02-vars-and-math.c
+$(OBJS):
-	gcc -o ./bin/02-mathvars 02-vars-and-math.c
+	$(CC) -o ./$@ $(patsubst bin/%,%.c,$@)
-
-c2f: 03-celsius-to-fahrenheit.c
-	gcc -o ./bin/03-c2f 03-celsius-to-fahrenheit.c
-
-input: 04-file-copying.c
-	gcc -o ./bin/04-input 04-file-copying.c
-
-count: 05-char-counting.c
-	gcc -o ./bin/05-count 05-char-counting.c
-
-countlines: 06-line-count.c
-	gcc -o ./bin/06-line-count 06-line-count.c
 
 clean:
-	$(RM) ./bin/*-*
+	$(RM) ./bin/*

README.adoc

@@ -152,3 +152,68 @@ https://github.com/krislamo/knrc/commit/588969b09fabab1e91ff4f4b1c37e87fc23cf76b
 https://github.com/krislamo/knrc/blob/588969b09fabab1e91ff4f4b1c37e87fc23cf76b/02-vars-and-math.c[(Source)]
 
 Move some numbers around to reverse the table.
+
+09-word-count.c
+~~~~~~~~~~~~~~~~
+https://github.com/krislamo/knrc/commit/d064db2b171e3da74fd5082ae29456f64caeafeb[(Diff)]
+https://github.com/krislamo/knrc/blob/d064db2b171e3da74fd5082ae29456f64caeafeb/09-word-count.c[(Source)]
+
+Textbook example of counting lines, words, and characters from input.
+
+Exercise 1-11: test the word count program
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+No input:
+
+----
+$ ./bin/09-word-count
+0 0 0
+$
+----
+
+Just 3 newlines:
+
+----
+$ ./bin/09-word-count
+
+
+
+3 0 3
+$
+----
+
+Just 3 tabs:
+
+----
+$ ./bin/09-word-count
+                        0 0 3
+$
+----
+
+Just 3 spaces:
+
+----
+$ ./bin/09-word-count
+   0 0 3
+$
+----
+
+Just a single word per line:
+
+----
+$ ./bin/09-word-count
+one
+word
+per
+line
+4 4 18
+$
+----
+
+Three blanks before and after:
+
+----
+$ ./bin/09-word-count
+   three blanks before/after   0 3 31
+$
+----