Adding example project and cmake build process

CMakeLists.txt

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+cmake_minimum_required(VERSION 3)
+
+project(starter
+        DESCRIPTION "a starter repo for building Universal applications"
+	VERSION "0.0.1"
+	LANGUAGES C CXX ASM
+	HOMEPAGE_URL "https://github.com/stillwater-sc/universal")
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(Boost)
+if(Boost_FOUND)
+	message(STATUS "Boost_INCLUDE_DIR" ${Boost_INCLUDE_DIR})
+	include_directories(${Boost_INCLUDE_DIR})
+endif(Boost_FOUND)
+
+set(STARTER_ROOT_DIR ${PROJECT_SOURCE_DIR})
+set(STARTER_INSTALL_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/include)
+set(STARTER_INSTALL_LIB_DIR ${PROJECT_SOURCE_DIR}/lib)
+set(STARTER_INSTALL_BIN_DIR ${PROJECT_SOURCE_DIR}/bin)
+
+add_definitions(-D UNIVERSAL_ENABLE_TEST=OFF)
+
+# include file for common includes 
+include_directories(${STARTER_INSTALL_INCLUDE_DIR})
+
+enable_testing()
+#include(CTest)
+
+# Universal is a C++ header-only library, so we do not need to build anything
+# if you do add this line, you will get all the Universal regression tests,
+# playground, education, applications, and command line utilities.
+# You can only add this build subdirectory to ONE and only ONE project
+# within the starter workspace. Multiple includes will yield multiple definitions
+# of build, install, and uninstall targets.
+#add_subdirectory(${STARTER_ROOT_DIR}/ext/stillwater-sc/universal build_universal) 
+
+# MTL4 is a C++ header-only library, so we do not need to build anything
+#add_subdirectory(${STARTER_ROOT_DIR}/ext/stillwater-sc/mtl4 build_mtl4) 
+
+add_subdirectory(src)

src/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.22)
+project(starter_examples)
+
+# simple starter skeleton for projects that use the Universal Number System library
+add_subdirectory(apps/example)
+

src/example/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.22)
+set(app_name example)
+project(${app_name} CXX)
+
+# Universal is a C++ header-only library, so we do not need to build anything
+include_directories(${STARTER_ROOT_DIR}/ext/stillwater-sc/universal/include)
+
+# source files that make up the command
+set(SOURCE_FILES
+	example.cpp
+)
+
+add_executable(${app_name} ${SOURCE_FILES})
+set(folder "Applications/Example")
+set_target_properties(${app_name} PROPERTIES FOLDER ${folder})
+
+# add libraries if you need them
+#target_link_libraries(example required-library1 required-library2)
+install(TARGETS ${app_name} DESTINATION ${STARTER_INSTALL_BIN_DIR})
+#install(FILES my-consolidated-include.hpp DESTINATION ${STARTER_INSTALL_INCLUDE_DIR})

src/example/example.cpp

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+#include <iostream>
+#include <iomanip>
+#include <cmath>
+
+#include <universal/number/edecimal/edecimal.hpp>
+#include <universal/number/fixpnt/fixpnt.hpp>
+
+int main(int argc, char* argv)
+try {
+	edecimal d, e, f;
+
+	e = 1.0f;
+	f = 0xFFFF'FFFF'FFFF'FFFFull;
+	d = e + f;
+
+	std::cout << d << std::endl;
+
+	return EXIT_SUCCESS;
+
+}
+catch (const char* msg) {
+	std::cerr << msg << std::endl;
+	return EXIT_FAILURE;
+}
+catch (const sw::universal::arithmetic_exception& err) {
+	std::cerr << "Unprocessed universal arithmetic exception: " << err.what() << std::endl;
+	return EXIT_FAILURE;
+}
+catch (...) {
+	std::cerr << "Caught unknown exception" << std::endl;
+	return EXIT_FAILURE;
+}