diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7cd6931..400ad06 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,10 +1,12 @@
 # Top-level CMakeLists.txt
 
 # Set the minimum required version of CMake
-cmake_minimum_required(VERSION 3.26)
+cmake_minimum_required(VERSION 3.27)
 
 # Set the policy for find_package to use upper-case <PACKAGENAME>_ROOT variables
-cmake_policy(SET CMP0144 OLD)
+cmake_policy(SET CMP0146 OLD)
+
+set(CMAKE_VERBOSE_MAKEFILE on)
 
 # Project configuration
 project(black-scholes-cpp VERSION 1.0 LANGUAGES CXX)
diff --git a/Makefile b/Makefile
index 459b7cd..179e7a9 100644
--- a/Makefile
+++ b/Makefile
@@ -1,37 +1,492 @@
-NAME := blackscholes
+# CMAKE generated file: DO NOT EDIT!
+# Generated by "Unix Makefiles" Generator, CMake Version 3.27
 
-# Specify the C++ compiler
-CXX = g++
+# Default target executed when no arguments are given to make.
+default_target: all
+.PHONY : default_target
 
-# Compiler flags
-CXXFLAGS = -std=c++20 -Wconversion -Wall -Werror -Wextra -pedantic -g -I/opt/homebrew/opt/curl/include
+# Allow only one "make -f Makefile2" at a time, but pass parallelism.
+.NOTPARALLEL:
 
-# Update compiler flags to include paths for oneMKL headers
-CXXFLAGS += -I/opt/intel/oneapi/mkl/2023.2.0/include
+#=============================================================================
+# Special targets provided by cmake.
 
-# Linker flags and libraries
-LDFLAGS = -L/opt/homebrew/opt/curl/lib
+# Disable implicit rules so canonical targets will work.
+.SUFFIXES:
 
-# Update library paths and linking flags to ensure that the linker can find the oneMKL library files
-LDFLAGS += -L/opt/intel/oneapi/mkl2023.2.0/lib -WI, -rpath -lmkl_intel_ilp64 -lmkl_tbb_thread -lmkl_core -lpthread -lm -ldl
+# Disable VCS-based implicit rules.
+% : %,v
 
-LIBS = -lcurl
+# Disable VCS-based implicit rules.
+% : RCS/%
 
-# Define the source files used in the project
-SRCS = $(wildcard *.cpp)
-OBJS = $(SRCS:.cpp=.o)
+# Disable VCS-based implicit rules.
+% : RCS/%,v
 
-# Specify the target executable
-EXE = bs
+# Disable VCS-based implicit rules.
+% : SCCS/s.%
 
-# Default rule to build the executable
-$(EXE): $(OBJS)
-	$(CXX) $(CXXFLAGS) $(LDFLAGS) $^ -o $@ $(LIBS)
+# Disable VCS-based implicit rules.
+% : s.%
 
-# Rule to compile C++ source files into object files
-%.o: %.cpp
-	$(CXX) $(CXXFLAGS) -c $< -o $@
+.SUFFIXES: .hpux_make_needs_suffix_list
 
-# Clean rule to remove object files and the executable
+# Produce verbose output by default.
+VERBOSE = 1
+
+# Command-line flag to silence nested $(MAKE).
+$(VERBOSE)MAKESILENT = -s
+
+#Suppress display of executed commands.
+$(VERBOSE).SILENT:
+
+# A target that is always out of date.
+cmake_force:
+.PHONY : cmake_force
+
+#=============================================================================
+# Set environment variables for the build.
+
+# The shell in which to execute make rules.
+SHELL = /bin/sh
+
+# The CMake executable.
+CMAKE_COMMAND = /opt/homebrew/Cellar/cmake/3.27.0/bin/cmake
+
+# The command to remove a file.
+RM = /opt/homebrew/Cellar/cmake/3.27.0/bin/cmake -E rm -f
+
+# Escaping for special characters.
+EQUALS = =
+
+# The top-level source directory on which CMake was run.
+CMAKE_SOURCE_DIR = /Users/lyndseygu/clionprojects/black-scholes-cxx
+
+# The top-level build directory on which CMake was run.
+CMAKE_BINARY_DIR = /Users/lyndseygu/clionprojects/black-scholes-cxx
+
+#=============================================================================
+# Targets provided globally by CMake.
+
+# Special rule for the target test
+test:
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Running tests..."
+	/opt/homebrew/Cellar/cmake/3.27.0/bin/ctest --force-new-ctest-process $(ARGS)
+.PHONY : test
+
+# Special rule for the target test
+test/fast: test
+.PHONY : test/fast
+
+# Special rule for the target edit_cache
+edit_cache:
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Running CMake cache editor..."
+	/opt/homebrew/Cellar/cmake/3.27.0/bin/ccmake -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR)
+.PHONY : edit_cache
+
+# Special rule for the target edit_cache
+edit_cache/fast: edit_cache
+.PHONY : edit_cache/fast
+
+# Special rule for the target rebuild_cache
+rebuild_cache:
+	@$(CMAKE_COMMAND) -E cmake_echo_color "--switch=$(COLOR)" --cyan "Running CMake to regenerate build system..."
+	/opt/homebrew/Cellar/cmake/3.27.0/bin/cmake --regenerate-during-build -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR)
+.PHONY : rebuild_cache
+
+# Special rule for the target rebuild_cache
+rebuild_cache/fast: rebuild_cache
+.PHONY : rebuild_cache/fast
+
+# The main all target
+all: cmake_check_build_system
+	$(CMAKE_COMMAND) -E cmake_progress_start /Users/lyndseygu/clionprojects/black-scholes-cxx/CMakeFiles /Users/lyndseygu/clionprojects/black-scholes-cxx//CMakeFiles/progress.marks
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 all
+	$(CMAKE_COMMAND) -E cmake_progress_start /Users/lyndseygu/clionprojects/black-scholes-cxx/CMakeFiles 0
+.PHONY : all
+
+# The main clean target
 clean:
-	rm -f $(OBJS) $(EXE)
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 clean
+.PHONY : clean
+
+# The main clean target
+clean/fast: clean
+.PHONY : clean/fast
+
+# Prepare targets for installation.
+preinstall: all
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 preinstall
+.PHONY : preinstall
+
+# Prepare targets for installation.
+preinstall/fast:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 preinstall
+.PHONY : preinstall/fast
+
+# clear depends
+depend:
+	$(CMAKE_COMMAND) -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) --check-build-system CMakeFiles/Makefile.cmake 1
+.PHONY : depend
+
+#=============================================================================
+# Target rules for targets named blackScholesLibrary
+
+# Build rule for target.
+blackScholesLibrary: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 blackScholesLibrary
+.PHONY : blackScholesLibrary
+
+# fast build rule for target.
+blackScholesLibrary/fast:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/build
+.PHONY : blackScholesLibrary/fast
+
+#=============================================================================
+# Target rules for targets named black_scholes_cpp
+
+# Build rule for target.
+black_scholes_cpp: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 black_scholes_cpp
+.PHONY : black_scholes_cpp
+
+# fast build rule for target.
+black_scholes_cpp/fast:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/build
+.PHONY : black_scholes_cpp/fast
+
+#=============================================================================
+# Target rules for targets named cleanup
+
+# Build rule for target.
+cleanup: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 cleanup
+.PHONY : cleanup
+
+# fast build rule for target.
+cleanup/fast:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/cleanup.dir/build.make CMakeFiles/cleanup.dir/build
+.PHONY : cleanup/fast
+
+#=============================================================================
+# Target rules for targets named run_tests_gtest
+
+# Build rule for target.
+run_tests_gtest: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 run_tests_gtest
+.PHONY : run_tests_gtest
+
+# fast build rule for target.
+run_tests_gtest/fast:
+	$(MAKE) $(MAKESILENT) -f gtest/CMakeFiles/run_tests_gtest.dir/build.make gtest/CMakeFiles/run_tests_gtest.dir/build
+.PHONY : run_tests_gtest/fast
+
+#=============================================================================
+# Target rules for targets named blackScholesModelTest
+
+# Build rule for target.
+blackScholesModelTest: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 blackScholesModelTest
+.PHONY : blackScholesModelTest
+
+# fast build rule for target.
+blackScholesModelTest/fast:
+	$(MAKE) $(MAKESILENT) -f gtest/CMakeFiles/blackScholesModelTest.dir/build.make gtest/CMakeFiles/blackScholesModelTest.dir/build
+.PHONY : blackScholesModelTest/fast
+
+#=============================================================================
+# Target rules for targets named bsm
+
+# Build rule for target.
+bsm: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 bsm
+.PHONY : bsm
+
+# fast build rule for target.
+bsm/fast:
+	$(MAKE) $(MAKESILENT) -f src/CMakeFiles/bsm.dir/build.make src/CMakeFiles/bsm.dir/build
+.PHONY : bsm/fast
+
+#=============================================================================
+# Target rules for targets named black_scholes_cpp_test
+
+# Build rule for target.
+black_scholes_cpp_test: cmake_check_build_system
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/Makefile2 black_scholes_cpp_test
+.PHONY : black_scholes_cpp_test
+
+# fast build rule for target.
+black_scholes_cpp_test/fast:
+	$(MAKE) $(MAKESILENT) -f test/CMakeFiles/black_scholes_cpp_test.dir/build.make test/CMakeFiles/black_scholes_cpp_test.dir/build
+.PHONY : black_scholes_cpp_test/fast
+
+src/Program.o: src/Program.cpp.o
+.PHONY : src/Program.o
+
+# target to build an object file
+src/Program.cpp.o:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/Program.cpp.o
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/Program.cpp.o
+.PHONY : src/Program.cpp.o
+
+src/Program.i: src/Program.cpp.i
+.PHONY : src/Program.i
+
+# target to preprocess a source file
+src/Program.cpp.i:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/Program.cpp.i
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/Program.cpp.i
+.PHONY : src/Program.cpp.i
+
+src/Program.s: src/Program.cpp.s
+.PHONY : src/Program.s
+
+# target to generate assembly for a file
+src/Program.cpp.s:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/Program.cpp.s
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/Program.cpp.s
+.PHONY : src/Program.cpp.s
+
+src/blackScholesModel.o: src/blackScholesModel.cpp.o
+.PHONY : src/blackScholesModel.o
+
+# target to build an object file
+src/blackScholesModel.cpp.o:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/blackScholesModel.cpp.o
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/blackScholesModel.cpp.o
+.PHONY : src/blackScholesModel.cpp.o
+
+src/blackScholesModel.i: src/blackScholesModel.cpp.i
+.PHONY : src/blackScholesModel.i
+
+# target to preprocess a source file
+src/blackScholesModel.cpp.i:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/blackScholesModel.cpp.i
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/blackScholesModel.cpp.i
+.PHONY : src/blackScholesModel.cpp.i
+
+src/blackScholesModel.s: src/blackScholesModel.cpp.s
+.PHONY : src/blackScholesModel.s
+
+# target to generate assembly for a file
+src/blackScholesModel.cpp.s:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/blackScholesModel.cpp.s
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/blackScholesModel.cpp.s
+.PHONY : src/blackScholesModel.cpp.s
+
+src/hestonModel.o: src/hestonModel.cpp.o
+.PHONY : src/hestonModel.o
+
+# target to build an object file
+src/hestonModel.cpp.o:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/hestonModel.cpp.o
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/hestonModel.cpp.o
+.PHONY : src/hestonModel.cpp.o
+
+src/hestonModel.i: src/hestonModel.cpp.i
+.PHONY : src/hestonModel.i
+
+# target to preprocess a source file
+src/hestonModel.cpp.i:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/hestonModel.cpp.i
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/hestonModel.cpp.i
+.PHONY : src/hestonModel.cpp.i
+
+src/hestonModel.s: src/hestonModel.cpp.s
+.PHONY : src/hestonModel.s
+
+# target to generate assembly for a file
+src/hestonModel.cpp.s:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/hestonModel.cpp.s
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/hestonModel.cpp.s
+.PHONY : src/hestonModel.cpp.s
+
+src/inputReader.o: src/inputReader.cpp.o
+.PHONY : src/inputReader.o
+
+# target to build an object file
+src/inputReader.cpp.o:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/inputReader.cpp.o
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/inputReader.cpp.o
+.PHONY : src/inputReader.cpp.o
+
+src/inputReader.i: src/inputReader.cpp.i
+.PHONY : src/inputReader.i
+
+# target to preprocess a source file
+src/inputReader.cpp.i:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/inputReader.cpp.i
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/inputReader.cpp.i
+.PHONY : src/inputReader.cpp.i
+
+src/inputReader.s: src/inputReader.cpp.s
+.PHONY : src/inputReader.s
+
+# target to generate assembly for a file
+src/inputReader.cpp.s:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/inputReader.cpp.s
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/inputReader.cpp.s
+.PHONY : src/inputReader.cpp.s
+
+src/main.o: src/main.cpp.o
+.PHONY : src/main.o
+
+# target to build an object file
+src/main.cpp.o:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/main.cpp.o
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/main.cpp.o
+.PHONY : src/main.cpp.o
+
+src/main.i: src/main.cpp.i
+.PHONY : src/main.i
+
+# target to preprocess a source file
+src/main.cpp.i:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/main.cpp.i
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/main.cpp.i
+.PHONY : src/main.cpp.i
+
+src/main.s: src/main.cpp.s
+.PHONY : src/main.s
+
+# target to generate assembly for a file
+src/main.cpp.s:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/main.cpp.s
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/main.cpp.s
+.PHONY : src/main.cpp.s
+
+src/optionGreeks.o: src/optionGreeks.cpp.o
+.PHONY : src/optionGreeks.o
+
+# target to build an object file
+src/optionGreeks.cpp.o:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/optionGreeks.cpp.o
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/optionGreeks.cpp.o
+.PHONY : src/optionGreeks.cpp.o
+
+src/optionGreeks.i: src/optionGreeks.cpp.i
+.PHONY : src/optionGreeks.i
+
+# target to preprocess a source file
+src/optionGreeks.cpp.i:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/optionGreeks.cpp.i
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/optionGreeks.cpp.i
+.PHONY : src/optionGreeks.cpp.i
+
+src/optionGreeks.s: src/optionGreeks.cpp.s
+.PHONY : src/optionGreeks.s
+
+# target to generate assembly for a file
+src/optionGreeks.cpp.s:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/optionGreeks.cpp.s
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/optionGreeks.cpp.s
+.PHONY : src/optionGreeks.cpp.s
+
+src/optionGreeksModel.o: src/optionGreeksModel.cpp.o
+.PHONY : src/optionGreeksModel.o
+
+# target to build an object file
+src/optionGreeksModel.cpp.o:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/optionGreeksModel.cpp.o
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/optionGreeksModel.cpp.o
+.PHONY : src/optionGreeksModel.cpp.o
+
+src/optionGreeksModel.i: src/optionGreeksModel.cpp.i
+.PHONY : src/optionGreeksModel.i
+
+# target to preprocess a source file
+src/optionGreeksModel.cpp.i:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/optionGreeksModel.cpp.i
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/optionGreeksModel.cpp.i
+.PHONY : src/optionGreeksModel.cpp.i
+
+src/optionGreeksModel.s: src/optionGreeksModel.cpp.s
+.PHONY : src/optionGreeksModel.s
+
+# target to generate assembly for a file
+src/optionGreeksModel.cpp.s:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/optionGreeksModel.cpp.s
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/optionGreeksModel.cpp.s
+.PHONY : src/optionGreeksModel.cpp.s
+
+src/outputWriter.o: src/outputWriter.cpp.o
+.PHONY : src/outputWriter.o
+
+# target to build an object file
+src/outputWriter.cpp.o:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/outputWriter.cpp.o
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/outputWriter.cpp.o
+.PHONY : src/outputWriter.cpp.o
+
+src/outputWriter.i: src/outputWriter.cpp.i
+.PHONY : src/outputWriter.i
+
+# target to preprocess a source file
+src/outputWriter.cpp.i:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/outputWriter.cpp.i
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/outputWriter.cpp.i
+.PHONY : src/outputWriter.cpp.i
+
+src/outputWriter.s: src/outputWriter.cpp.s
+.PHONY : src/outputWriter.s
+
+# target to generate assembly for a file
+src/outputWriter.cpp.s:
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/blackScholesLibrary.dir/build.make CMakeFiles/blackScholesLibrary.dir/src/outputWriter.cpp.s
+	$(MAKE) $(MAKESILENT) -f CMakeFiles/black_scholes_cpp.dir/build.make CMakeFiles/black_scholes_cpp.dir/src/outputWriter.cpp.s
+.PHONY : src/outputWriter.cpp.s
+
+# Help Target
+help:
+	@echo "The following are some of the valid targets for this Makefile:"
+	@echo "... all (the default if no target is provided)"
+	@echo "... clean"
+	@echo "... depend"
+	@echo "... edit_cache"
+	@echo "... rebuild_cache"
+	@echo "... test"
+	@echo "... cleanup"
+	@echo "... blackScholesLibrary"
+	@echo "... blackScholesModelTest"
+	@echo "... black_scholes_cpp"
+	@echo "... black_scholes_cpp_test"
+	@echo "... bsm"
+	@echo "... run_tests_gtest"
+	@echo "... src/Program.o"
+	@echo "... src/Program.i"
+	@echo "... src/Program.s"
+	@echo "... src/blackScholesModel.o"
+	@echo "... src/blackScholesModel.i"
+	@echo "... src/blackScholesModel.s"
+	@echo "... src/hestonModel.o"
+	@echo "... src/hestonModel.i"
+	@echo "... src/hestonModel.s"
+	@echo "... src/inputReader.o"
+	@echo "... src/inputReader.i"
+	@echo "... src/inputReader.s"
+	@echo "... src/main.o"
+	@echo "... src/main.i"
+	@echo "... src/main.s"
+	@echo "... src/optionGreeks.o"
+	@echo "... src/optionGreeks.i"
+	@echo "... src/optionGreeks.s"
+	@echo "... src/optionGreeksModel.o"
+	@echo "... src/optionGreeksModel.i"
+	@echo "... src/optionGreeksModel.s"
+	@echo "... src/outputWriter.o"
+	@echo "... src/outputWriter.i"
+	@echo "... src/outputWriter.s"
+.PHONY : help
+
+
+
+#=============================================================================
+# Special targets to cleanup operation of make.
+
+# Special rule to run CMake to check the build system integrity.
+# No rule that depends on this can have commands that come from listfiles
+# because they might be regenerated.
+cmake_check_build_system:
+	$(CMAKE_COMMAND) -S$(CMAKE_SOURCE_DIR) -B$(CMAKE_BINARY_DIR) --check-build-system CMakeFiles/Makefile.cmake 0
+.PHONY : cmake_check_build_system
+
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 6fe8132..c81361f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,7 +1,7 @@
 # CMakeLists.txt for the src directory
 
 # Set the minimum required version of CMake
-cmake_minimum_required(VERSION 3.26)
+cmake_minimum_required(VERSION 3.27)
 
 # Set the policy for find_package to use upper-case <PACKAGENAME>_ROOT variables
 cmake_policy(SET CMP0144 OLD)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 964cf4c..2d3e89d 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,13 +1,15 @@
 # CMakeLists.txt for the test directory
 
 # Set the minimum required version of CMake
-cmake_minimum_required(VERSION 3.26)
+cmake_minimum_required(VERSION 3.27)
 
 # Set the policy for find_package to use upper-case <PACKAGENAME>_ROOT variables
 cmake_policy(SET CMP0144 OLD)
 
-# Set GTest root directory
-set(GTEST_ROOT "/opt/homebrew/Cellar/googletest/1.14.0" CACHE PATH "Google Test root directory")
+set(CMAKE_VERBOSE_MAKEFILE on)
+
+## Set GTest root directory
+#set(GTEST_ROOT "/opt/homebrew/Cellar/googletest/1.14.0" CACHE PATH "Google Test root directory")
 
 # assume built-in pthreads on MacOS
 if(APPLE)