1 files changed, 17 insertions, 7 deletions
diff --git a/main.c b/main.c
index ab1864d..3a1c2f2 100644
--- a/main.c
+++ b/main.c
@@ -13,12 +13,10 @@
  * Description: Entrypoint
  */
 
-#include "./base.h"
-#include "./lisp.h"
-#include "./memory.h"
-#include "./reader.h"
-#include "./sv.h"
-#include "./vec.h"
+#include <lib/sv.h>
+#include <lib/vec.h>
+#include <lisp/lisp.h>
+#include <lisp/reader.h>
 
 #include <assert.h>
 #include <ctype.h>
@@ -27,6 +25,15 @@
 #include <stdio.h>
 #include <string.h>
 
+void usage(char *prog_name, FILE *fp)
+{
+  fprintf(fp,
+          "Usage: %s [FILE]\n"
+          "Interpret FILE as scheme in the OATS interpreter.\n"
+          "\t[FILE]: name of file\n",
+          prog_name);
+}
+
 int main(int argc, char *argv[])
 {
   int exit             = 0;
@@ -36,7 +43,10 @@ int main(int argc, char *argv[])
   if (argc > 1)
     filename = argv[1];
   else
-    filename = "./r7rs-tests.scm";
+  {
+    usage(argv[0], stderr);
+    return 1;
+  }
 
   FILE *fp = fopen(filename, "r");
   if (!fp)