From 67027f7fcaf1b0c98dc9ff9e579d7547eadc8cd6 Mon Sep 17 00:00:00 2001
From: Aki <please@ignore.pl>
Date: Sat, 17 Jul 2021 13:38:06 +0200
Subject: Added basic usage print

---
 markdown.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'markdown.cpp')

diff --git a/markdown.cpp b/markdown.cpp
index ddad512..358edcf 100644
--- a/markdown.cpp
+++ b/markdown.cpp
@@ -54,10 +54,18 @@ static void resized(GLFWwindow *, int width, int height)
 	g_window_size.y = static_cast<float>(height);
 }
 
+static void print_usage(const char * program)
+{
+	std::cerr << "Usage: " << program << " FILE" << std::endl;
+}
+
 int main(int argc, char ** argv)
 {
 	if (2 != argc)
-		return 1;
+	{
+		print_usage(argv[0]);
+		return 2;
+	}
 
 	glfwSetErrorCallback(glfw_error_callback);
 	if (!glfwInit())
-- 
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