--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tty-main.cpp	Mon May 13 09:48:06 2019 -0500
@@ -0,0 +1,59 @@
+#include <iostream>
+#include <string>
+
+#include <cstdio>
+#include <cstdlib>
+
+#include <readline/readline.h>
+#include <readline/history.h>
+
+#include "gui-main.h"
+#include "tty-main.h"
+
+#include "parse.h"
+
+namespace tty
+{
+  int main (int, char **)
+  {
+    std::cout
+      << "Example Calculator.\n"
+      << "Available operations: + - * / ^ ()\n"
+      << "Semicolon terminates statement.\n"
+      << "GNU Readline available for history editing.\n" << std::endl;
+
+    interpreter::parser_init ();
+
+    for (;;)
+      {
+        char *tmp = readline (interpreter::beg_of_stmt ? ">> " : "");
+
+        if (! tmp)
+          break;
+
+        if (*tmp)
+          {
+            add_history (tmp);
+            using_history ();
+          }
+
+        std::string line = tmp;
+
+        free (tmp);
+
+        int status = interpreter::parse_and_execute (line);
+
+        if (status < 0)
+          break;
+      }
+
+    interpreter::parser_fini ();
+
+    return 0;
+  }
+
+  void emit_result (double value)
+  {
+    std::cout << "ans = " << value << std::endl;
+  }
+}