From d1fc93b8e851dad37df992fc2e6e07de11870480 Mon Sep 17 00:00:00 2001
From: Tomohiro IKEDA <rilakkuma.san.xjapan@gmail.com>
Date: Sat, 21 Mar 2020 03:21:14 +0900
Subject: [PATCH 1/2] fix: Use standard error as output

---
 source/cli/NFDriverCLI.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/cli/NFDriverCLI.cpp b/source/cli/NFDriverCLI.cpp
index 0b99851..5aedb71 100644
--- a/source/cli/NFDriverCLI.cpp
+++ b/source/cli/NFDriverCLI.cpp
@@ -80,7 +80,7 @@ int main(int argc, const char *argv[]) {
   const std::string samplerate_string = "44100.0";
 #else
   if (argc < 2) {
-    std::cout << "Invalid number of arguments: ./NFDriver [samplerate]" << std::endl;
+    std::cerr << "Invalid number of arguments: ./NFDriver [samplerate]" << std::endl;
     return 1;
   }
   const std::string samplerate_string = argv[1];

From 20bd958d82eb938ca1d9c9c3c8032e33a4042ec2 Mon Sep 17 00:00:00 2001
From: Tomohiro IKEDA <rilakkuma.san.xjapan@gmail.com>
Date: Sat, 21 Mar 2020 03:25:02 +0900
Subject: [PATCH 2/2] fix: Use `exit` instead of `return`

---
 source/cli/NFDriverCLI.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/source/cli/NFDriverCLI.cpp b/source/cli/NFDriverCLI.cpp
index 5aedb71..ddaea66 100644
--- a/source/cli/NFDriverCLI.cpp
+++ b/source/cli/NFDriverCLI.cpp
@@ -20,6 +20,8 @@
  */
 #include <NFDriver/NFDriver.h>
 
+#include <cstdlib>
+
 #define _USE_MATH_DEFINES
 #include <cmath>
 #include <iostream>
@@ -81,7 +83,7 @@ int main(int argc, const char *argv[]) {
 #else
   if (argc < 2) {
     std::cerr << "Invalid number of arguments: ./NFDriver [samplerate]" << std::endl;
-    return 1;
+    std::exit(1);
   }
   const std::string samplerate_string = argv[1];
 #endif