diff --git a/CMakeLists.txt b/CMakeLists.txt
index 75c194e..834eb6b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -22,6 +22,7 @@ project(ml)
 set(PROJECT_NAME ml)
 
 set(SOURCE
+	main.cpp
 	ml.cpp
 	ml_io.cpp
 	ml_date.cpp
diff --git a/debug.lsp b/debug.lsp
index 5b7945f..20ae9cf 100644
--- a/debug.lsp
+++ b/debug.lsp
@@ -21,9 +21,3 @@
           (term-blue (sprintf "%.2f" (list 1.11))) " "
           (term-yellow (sprintf "%.2f" (list 1.11))) " "
     ))
-
-    ;; (define q_change_str (sprintf "%+.2f %%" (list q)))
-    ;; (if (>= q_change 0.0) 
-    ;;     (define q_change_str (term-green q_change_str))
-    ;;     (define q_change_str (term-red q_change_str)))
-
diff --git a/doc/Doc.md b/doc/Doc.md
index 84edeb8..a64a7ea 100644
--- a/doc/Doc.md
+++ b/doc/Doc.md
@@ -43,27 +43,27 @@
 |`(member list item)`|Returns true (1) when list contains item||
 |`(uniq list)`|Returns list with removed duplicates ||
 |`(make-list len)`|Return list with len nil elements|`(make-list 3) => (nil nil nil)`|
-|`(make-list-of len value)`|||
+|`(make-list-of len value)`|Return list with len value elements||
 |`(map ..)`||`(map (lambda (x) (+ x 10)) '(1 2 3 4 5 6)) => (11 12 13 14 15 16)`|
 |`(filter lambda list)`||`(filter (lambda (x) (> x 2)) '(1 2 3 4 5)) => (3 4 5)`|
 |`(reduce lambda acumulator list)`||`>>> (reduce (lambda (x y) (+ (* x 10) y)) 0 '(1 2 3 4)) => 1234`|
-|`(exit ..)`|||
-|`(quit ..)`|||
-|`(print ..)`|||
-|`(input ..)`|||
-|`(random ..)`|||
-|`(include ..)`|||
-|`(read-file ..)`|||
-|`(write-file ..)`|||
-|`(read-url ..)`|||
-|`(system-cmd ..)`|||
-|`(ls-dir ..)`|||
+|`(exit code)`|Exit the program with an integer code||
+|`(quit code)`|Same as (exit ..)||
+|`(print ..)`|Print several values and return the last one||
+|`(input [prompt])`|Get user input with an optional prompt||
+|`(random low high)`|Get a random number between two numbers inclusively||
+|`(include file)`|Read a file and execute its code||
+|`(read-file filename)`|Get the contents of a file||
+|`(write-file filename)`|Write a string to a file||
+|`(read-url url [headers])`|Reads URL|Returnd list (status_code content)|
+|`(system-cmd command_str)`|Execute system command||
+|`(ls-dir ..)`|List a dir|List of directory entries|
 |`(is-file? ..)`|Returns true if passed filename is a file||
 |`(is-dir? ..)`|Returns true if passed filename is a directory||
-|`(parse-csv ..)`|||
-|`(parse-json ..)`|||
+|`(parse-csv string)`|Parse CSV string||
+|`(parse-json json_string)`|Parse JSON string||
 |`(save-csv ..)`|||
-|`(get-universal-time ..)`|||
+|`(get-universal-time)`|Get current time as secs from epoch||
 |`(date-to-str ..)`|||
 |`(str-to-date ..)`|||
 |`(date-add ..)`|||
@@ -77,4 +77,6 @@
 |`(eval ..)`|||
 |`(type ..)`|||
 |`(parse ..)`|||
+|`(make-list size)`|||
+|`(make-list-of size value)`|||
 |`(xx ..)`|||
diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..773c0c7
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,82 @@
+#include "ml.h"
+#include "ml_io.h"
+
+#include <iostream>
+
+
+MlValue run(const std::string &code, MlEnvironment &env);
+MlValue repl(MlEnvironment &env);
+
+
+void load_std_lib(MlEnvironment &env) {
+	std::string loader =
+	 R"( (define ___lib_path '("/usr/local/var/mlisp"))
+			(for d ___lib_path
+				(if (is-dir? d)
+					(for f (ls-dir d)
+						(if (regex-search? f "^.*\.l(i)?sp$")
+							(include (+ d "/" f))
+							'())
+					)
+					'()))
+		)";
+
+	run(loader, env);
+}
+
+
+bool cmdOptionExists(char **begin, char **end, const std::string &option) { return std::find(begin, end, option) != end; }
+
+
+std::vector<std::string> getCmdOption(char *argv[], int argc, const std::string &option) {
+	std::vector<std::string> tokens;
+	for (int i = 1; i < argc; ++i) {
+		if (option == argv[i] && i + 1 < argc) {
+			i++;
+			tokens.push_back(std::string(argv[i]));
+		}
+	}
+	return tokens;
+}
+
+
+int main(int argc, char *argv[]) {
+	MlEnvironment env;
+	std::vector<MlValue> args;
+	for (int i = 0; i < argc; i++)
+		args.push_back(MlValue::string(argv[i]));
+	env.set("cmd-args", MlValue(args));
+
+	srand(time(NULL));
+	try {
+		load_std_lib(env);
+        // for xcode profiling
+        // run(read_file_contents("/Users/vaclavt/Development/mlisp/tests/test.lsp"), env);
+
+		// help
+		if (cmdOptionExists(argv, argv + argc, "-h")) {
+			std::cout << "Usage:\n\t-h print this help\n\t-f source_file - executes code in file\n\t-c code - runs passed code\n\t-i runs repl\n\t-v prints version string\n\n";
+			return 0;
+		}
+
+		// version
+		if (cmdOptionExists(argv, argv + argc, "-v")) {
+			std::cout << VERSION << std::endl;
+			return 0;
+		}
+
+		if (argc == 1 || (argc == 2 && std::string(argv[1]) == "-i"))
+			repl(env);
+		else if (argc == 3 && std::string(argv[1]) == "-c")
+			run(argv[2], env);
+		else if (argc == 3 && std::string(argv[1]) == "-f")
+			run(read_file_contents(argv[2]), env);
+		else std::cerr << "invalid arguments" << std::endl;
+	} catch (MlError &e) {
+		std::cerr << e.description() << std::endl;
+	} catch (std::runtime_error &e) {
+		std::cerr << e.what() << std::endl;
+	}
+
+	return 0;
+}
diff --git a/ml.h b/ml.h
index 4910d97..e827d49 100644
--- a/ml.h
+++ b/ml.h
@@ -214,4 +214,4 @@ private:
     std::string str;
     std::vector<MlValue> list;
     MlEnvironment lambda_scope;
-};
\ No newline at end of file
+};