implement nl.main

2 files changed, 23 insertions, 1 deletions

diff --git a/md5.c b/md5.c
index 8fe9630..ba8dbf6 100644
--- a/md5.c
+++ b/md5.c
@@ -39,4 +39,3 @@ int main(int argc, const char *argv[])
   }
   return 1;
 }
-
diff --git a/nl.c b/nl.c
new file mode 100644
index 0000000..2af85f1
--- /dev/null
+++ b/nl.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+
+int main(int argc, const char *argv[])
+{
+  const char *filename = argv[1];
+  FILE *file = fopen(filename, "r");
+
+  if (file) {
+    int character;
+    int line_number;
+
+    printf("%6d  ", ++line_number);
+    while( ( character = getc(file) ) != EOF ) {
+      putchar(character);
+      if (character == '\n') {
+        printf("%6d  ", ++line_number);
+      }
+    }
+    fclose(file);
+    return 0;
+  }
+  return 1;
+}