diff --git a/Step1/CMakeLists.txt b/Step1/CMakeLists.txt
index 243606c..9b2f09e 100644
--- a/Step1/CMakeLists.txt
+++ b/Step1/CMakeLists.txt
@@ -1,16 +1,14 @@
-# TODO 1: Set the minimum required version of CMake to be 3.10
 cmake_minimum_required(VERSION 3.10)
-# TODO 2: Create a project named Tutorial
 project(Tutorial)
 # TODO 7: Set the project version number as 1.0 in the above project command
 
 # TODO 6: Set the variable CMAKE_CXX_STANDARD to 11
 #         and the variable CMAKE_CXX_STANDARD_REQUIRED to True
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # TODO 8: Use configure_file to configure and copy TutorialConfig.h.in to
 #         TutorialConfig.h
 
-# TODO 3: Add an executable called Tutorial to the project
-# Hint: Be sure to specify the source file as tutorial.cxx
 add_executable(Tutorial tutorial.cxx)
 # TODO 9: Use target_include_directories to include ${PROJECT_BINARY_DIR}
diff --git a/Step1/tutorial.cxx b/Step1/tutorial.cxx
index 64d0916..1c4977e 100644
--- a/Step1/tutorial.cxx
+++ b/Step1/tutorial.cxx
@@ -1,6 +1,6 @@
 // A simple program that computes the square root of a number
 #include <cmath>
-#include <cstdlib> // TODO 5: Remove this line
+
 #include <iostream>
 #include <string>
 
@@ -16,8 +16,7 @@ int main(int argc, char* argv[])
   }
 
   // convert input to double
-  // TODO 4: Replace atof(argv[1]) with std::stod(argv[1])
-  const double inputValue = atof(argv[1]);
+  const double inputValue = std::stod(argv[1]);
 
   // calculate square root
   const double outputValue = sqrt(inputValue);