start a basic REPL (ch4)

.gitignore

@@ -0,0 +1 @@
+/main

main.c

@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+char input[2048];
+
+int main(int argc, char * argv[])
+{
+    puts("jlispy v0.0.1");
+    puts("Press Ctrl+C to exit\n");
+
+    while (1)
+    {
+        printf("jlispy> ");
+        fflush(stdout);
+        fgets(input, sizeof(input), stdin);
+        printf("no you're a %s\n", input);
+    }
+}