Added word translator and wc.

3 files changed, 73 insertions, 0 deletions

diff --git a/wc.c b/wc.c
new file mode 100644
index 0000000..4a5007d
--- /dev/null
+++ b/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);
+}
diff --git a/whitespace_converter.c b/whitespace_converter.c
new file mode 100644
index 0000000..6fee3bd
--- /dev/null
+++ b/whitespace_converter.c
@@ -0,0 +1,18 @@
+#include<stdio.h>
+
+/*
+ * Convert concurrent blanks to single blank.
+ */
+main() {
+    int c;
+
+    while ((c = getchar()) != EOF) {
+        if (c == ' ') {
+            while ((c = getchar()) == ' ') 
+                ;
+            putchar(' ');
+        }
+
+        putchar(c);
+    }
+}
diff --git a/whitespace_translator.c b/whitespace_translator.c
new file mode 100644
index 0000000..efb52b2
--- /dev/null
+++ b/whitespace_translator.c
@@ -0,0 +1,26 @@
+#include<stdio.h>
+
+/*
+ * Translate invisible whitespace characters to visible
+ * representations.
+ */
+main() {
+    int c;
+
+    while ((c = getchar()) != EOF) {
+        if (c == 8) {
+            printf("\\b");
+            continue;
+        }
+        if (c == 9) {
+            printf("\\t");
+            continue;
+        }
+        if (c == '\\') {
+            printf("\\\\");
+            continue;
+        }
+
+        putchar(c);
+    }
+}