Add model

include/common.h

@@ -0,0 +1,27 @@
+#ifndef COMMON_H
+#define COMMON_H
+#include <assert.h>
+#include <err.h>
+#include <errno.h>
+#include <libgen.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <getopt.h>
+#include <unistd.h>
+
+typedef unsigned int uint;
+
+/*Status code to represent respectively,
+a negative answer,
+a positive answer,
+an almost positive answer
+*/
+typedef enum {
+  NO,
+  YES,
+  ALMOST,
+} e_status;
+
+#endif /*COMMON*/