Add command line args and usage output

msupcm++/msupcm.cpp

@@ -1,8 +1,21 @@
+#include <iostream>
 #include "AudioTrackListBuilder.h"
 #include "sox_main.h"
 
+#define VERSION_NUMBER 0.2
+
 using namespace msu;
 
+void usage()
+{
+	std::cout << "msupcm v" << VERSION_NUMBER << std::endl << std::endl;
+	std::cout << "Usage:" << std::endl;
+	std::cout << "msupcm [tracks.json]" << std::endl;
+	std::cout << "msupcm -s [sox args]" << std::endl;
+	std::cout << "msupcm -v" << std::endl;
+	std::cout << "msupcm ?" << std::endl;
+}
+
 int main(int argc, char * argv[])
 {
 	switch (argc)
@@ -12,22 +25,41 @@ int main(int argc, char * argv[])
 		break;
 
 	case 2:
-		if (std::string(argv[1]).find_last_of(".") != std::string::npos  &&
+		if (std::string(argv[1]).compare("-v") == 0)
+		{
+			std::cout << "msupcm v" << VERSION_NUMBER << std::endl;
+			break;
+		}
+
+		else if (std::string(argv[1]).compare("?") == 0)
+		{
+			usage();
+			break;
+		}
+
+		else if (std::string(argv[1]).find_last_of(".") != std::string::npos  &&
 			std::string(argv[1]).substr(std::string(argv[1]).find_last_of(".")).compare(".json") == 0)
 		{
 			AudioTrackListBuilder(argv[1]).get().render();
 		}
 
+		else
+		{
+			usage();
+			exit(1);
+		}
+
 		break;
 
 	default:
 		if (std::string(argv[1]).compare("-s") == 0)
 		{
-			delete argv[1];
 			argv[1] = new char[4]{ 's','o','x','\0' };
 
-			soxmain(--argc, ++argv);
+			exit(soxmain(--argc, ++argv));
 		}
+
+		usage();
 		exit(1);
 	}