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diandiantidiandianti
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add ReadMe and cmake samples
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‎README.md

+790-2
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‎Tutorial_part1/CMakeLists.txt

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cmake_minimum_required(VERSION 3.10)
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#set project name and version
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project(Tutorial VERSION 1.0)
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######################################### test config ###################################
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#set config file
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configure_file(TutorialConfig.h.in TutorialConfig.h)
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add_executable(Tutorial Tutorial.cpp)
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#this line must after add_executable, or will be error!
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target_include_directories(Tutorial PUBLIC "${PROJECT_BINARY_DIR}")
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########################################################################################
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######################################### test standard ################################
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#set c++ standard
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#if comment this line, the default compiler will be use
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set(CMAKE_CXX_STANDARD 11)
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set(CMAKE_CXX_STANDARD_REQUIRED True)
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add_executable(TestStd TestStd.cpp)
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########################################################################################
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‎Tutorial_part1/TestStd.cpp

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#include <iostream>
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int main(int argc, char *argv[])
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{
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/** show the C++ version */
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if (__cplusplus == 201703L)
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std::cout << "C++17\n";
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else if (__cplusplus == 201402L)
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std::cout << "C++14\n";
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else if (__cplusplus == 201103L)
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std::cout << "C++11\n";
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else if (__cplusplus == 199711L)
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std::cout << "C++98\n";
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else
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std::cout << "pre-standard C++\n";
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return 0;
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}
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‎Tutorial_part1/Tutorial.cpp

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#include "TutorialConfig.h"
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#include <iostream>
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int main(int argc, char *argv[])
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{
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if (argc < 2) {
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// report version
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std::cout << argv[0] << " Version " << Tutorial_VERSION_MAJOR << "."
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<< Tutorial_VERSION_MINOR << std::endl;
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std::cout << "Usage: " << argv[0] << " number" << std::endl;
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return 1;
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}
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return 0;
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}
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‎Tutorial_part1/TutorialConfig.h.in

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#ifndef _TUTORIALCONFIG_H_
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#define _TUTORIALCONFIG_H_
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// the configured options and settings for Tutorial
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#define Tutorial_VERSION_MAJOR @Tutorial_VERSION_MAJOR@
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#define Tutorial_VERSION_MINOR @Tutorial_VERSION_MINOR@
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#endif // _TUTORIALCONFIG_H_
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‎Tutorial_part2/CMakeLists.txt

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cmake_minimum_required(VERSION 3.10)
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#set project name and version
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project(Tutorial VERSION 1.0)
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# add option
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option(USE_MYMATH "Use tutorial provided math implementation" ON)
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#########################################################################################
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######################################### test config ###################################
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#set config file
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configure_file(TutorialConfig.h.in TutorialConfig.h)
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add_executable(Tutorial Tutorial.cpp)
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#this line must after add_executable, or will be error!
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target_include_directories(Tutorial PUBLIC "${PROJECT_BINARY_DIR}")
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########################################################################################
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######################################### test standard ################################
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#set c++ standard
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#if comment this line, the default compiler will be use
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set(CMAKE_CXX_STANDARD 11)
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set(CMAKE_CXX_STANDARD_REQUIRED True)
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add_executable(TestStd TestStd.cpp)
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########################################################################################
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# if USE_MYMATH is true
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if(USE_MYMATH)
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add_subdirectory(MathFunctions)
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list(APPEND EXTRA_LIBS MathFunctions)
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list(APPEND EXTRA_INCLUDES "${PROJECT_SOURCE_DIR}/MathFunctions")
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message("USE_MYMATH is True")
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endif()
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########################################################################################
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# tesr sqrt
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add_executable(TestSqrt TestSqrt.cpp)
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target_link_libraries(TestSqrt PUBLIC ${EXTRA_LIBS})
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target_include_directories(TestSqrt PUBLIC
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"${PROJECT_BINARY_DIR}"
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${EXTRA_INCLUDES}
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)
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########################################################################################
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‎Tutorial_part2/MathFunctions/CMakeLists.txt

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add_library(MathFunctions SHARED mysqrt.cpp)
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‎Tutorial_part2/MathFunctions/MathFunctions.h

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#ifndef _MATHFUNCTION_H_
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#define _MATHFUNCTION_H_
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double mysqrt(double input);
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#endif /* _MATHFUNCTION_H_*/
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‎Tutorial_part2/MathFunctions/mysqrt.cpp

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#include "MathFunctions.h"
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#include <iostream>
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double mysqrt(double input)
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{
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if (input <= 0) {
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return 0;
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}
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double result = input;
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// do ten iterations
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for (int i = 0; i < 10; ++i) {
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if (result <= 0) {
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result = 0.1;
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}
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double delta = input - (result * result);
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result = result + 0.5 * delta / result;
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std::cout << "Computing sqrt of " << input << " to be " << result << std::endl;
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}
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return result;
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}
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‎Tutorial_part2/TestSqrt.cpp

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//TestSqrt.cpp
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#include <iostream>
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#include "TutorialConfig.h"
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#ifdef USE_MYMATH
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# include "MathFunctions.h"
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#else
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# include <cmath>
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#endif //USE_MYMATH
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int main(int argc, char** argv)
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{
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double inputValue = std::stod(argv[1]);
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#ifdef USE_MYMATH
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double sqrtValue = mysqrt(inputValue);
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#else
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double sqrtValue = sqrt(inputValue);
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#endif //USE_MYMATH
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std::cout << "Input value is :" << inputValue << std::endl;
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std::cout << "Sqrt value is :" << sqrtValue << std::endl;
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return 0;
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}
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‎Tutorial_part2/TestStd.cpp

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#include <iostream>
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int main(int argc, char *argv[])
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{
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/** show the C++ version */
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if (__cplusplus == 201703L)
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std::cout << "C++17\n";
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else if (__cplusplus == 201402L)
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std::cout << "C++14\n";
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else if (__cplusplus == 201103L)
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std::cout << "C++11\n";
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else if (__cplusplus == 199711L)
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std::cout << "C++98\n";
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else
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std::cout << "pre-standard C++\n";
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return 0;
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}
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‎Tutorial_part2/Tutorial.cpp

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#include "TutorialConfig.h"
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#include <iostream>
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int main(int argc, char *argv[])
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{
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if (argc < 2) {
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// report version
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std::cout << argv[0] << " Version " << Tutorial_VERSION_MAJOR << "."
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<< Tutorial_VERSION_MINOR << std::endl;
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std::cout << "Usage: " << argv[0] << " number" << std::endl;
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return 1;
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}
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return 0;
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}
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‎Tutorial_part2/TutorialConfig.h.in

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#ifndef _TUTORIALCONFIG_H_
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#define _TUTORIALCONFIG_H_
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// the configured options and settings for Tutorial
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#define Tutorial_VERSION_MAJOR @Tutorial_VERSION_MAJOR@
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#define Tutorial_VERSION_MINOR @Tutorial_VERSION_MINOR@
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#cmakedefine USE_MYMATH
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#endif // _TUTORIALCONFIG_H_
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‎Tutorial_part3/CMakeLists.txt

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cmake_minimum_required(VERSION 3.10)
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#set project name and version
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project(Tutorial VERSION 1.0)
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# add option
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option(USE_MYMATH "Use tutorial provided math implementation" ON)
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#########################################################################################
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######################################### test config ###################################
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#set config file
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configure_file(TutorialConfig.h.in TutorialConfig.h)
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add_executable(Tutorial Tutorial.cpp)
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#this line must after add_executable, or will be error!
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target_include_directories(Tutorial PUBLIC "${PROJECT_BINARY_DIR}")
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########################################################################################
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######################################### test standard ################################
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#set c++ standard
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#if comment this line, the default compiler will be use
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set(CMAKE_CXX_STANDARD 11)
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set(CMAKE_CXX_STANDARD_REQUIRED True)
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add_executable(TestStd TestStd.cpp)
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########################################################################################
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# if USE_MYMATH is true
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if(USE_MYMATH)
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add_subdirectory(MathFunctions)
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list(APPEND EXTRA_LIBS MathFunctions)
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message("USE_MYMATH is True")
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endif()
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########################################################################################
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# tesr sqrt
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add_executable(TestSqrt TestSqrt.cpp)
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target_link_libraries(TestSqrt PUBLIC ${EXTRA_LIBS})
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target_include_directories(TestSqrt PUBLIC
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"${PROJECT_BINARY_DIR}"
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)
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########################################################################################
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‎Tutorial_part3/MathFunctions/CMakeLists.txt

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add_library(MathFunctions SHARED mysqrt.cpp)
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target_include_directories(MathFunctions
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INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}
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)
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‎Tutorial_part3/MathFunctions/MathFunctions.h

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#ifndef _MATHFUNCTION_H_
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#define _MATHFUNCTION_H_
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double mysqrt(double input);
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#endif /* _MATHFUNCTION_H_*/
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‎Tutorial_part3/MathFunctions/mysqrt.cpp

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#include "MathFunctions.h"
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#include <iostream>
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double mysqrt(double input)
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{
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if (input <= 0) {
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return 0;
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}
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double result = input;
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// do ten iterations
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for (int i = 0; i < 10; ++i) {
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if (result <= 0) {
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result = 0.1;
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}
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double delta = input - (result * result);
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result = result + 0.5 * delta / result;
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std::cout << "Computing sqrt of " << input << " to be " << result << std::endl;
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}
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return result;
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}
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‎Tutorial_part3/TestSqrt.cpp

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//TestSqrt.cpp
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#include <iostream>
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#include "TutorialConfig.h"
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#ifdef USE_MYMATH
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# include "MathFunctions.h"
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#else
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# include <cmath>
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#endif //USE_MYMATH
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int main(int argc, char** argv)
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{
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double inputValue = std::stod(argv[1]);
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#ifdef USE_MYMATH
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double sqrtValue = mysqrt(inputValue);
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#else
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double sqrtValue = sqrt(inputValue);
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#endif //USE_MYMATH
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std::cout << "Input value is :" << inputValue << std::endl;
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std::cout << "Sqrt value is :" << sqrtValue << std::endl;
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return 0;
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}
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‎Tutorial_part3/TestStd.cpp

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#include <iostream>
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int main(int argc, char *argv[])
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{
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/** show the C++ version */
6+
if (__cplusplus == 201703L)
7+
std::cout << "C++17\n";
8+
else if (__cplusplus == 201402L)
9+
std::cout << "C++14\n";
10+
else if (__cplusplus == 201103L)
11+
std::cout << "C++11\n";
12+
else if (__cplusplus == 199711L)
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std::cout << "C++98\n";
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else
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std::cout << "pre-standard C++\n";
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return 0;
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}
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‎Tutorial_part3/Tutorial.cpp

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#include "TutorialConfig.h"
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#include <iostream>
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int main(int argc, char *argv[])
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{
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if (argc < 2) {
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// report version
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std::cout << argv[0] << " Version " << Tutorial_VERSION_MAJOR << "."
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<< Tutorial_VERSION_MINOR << std::endl;
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std::cout << "Usage: " << argv[0] << " number" << std::endl;
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return 1;
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}
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return 0;
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}
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‎Tutorial_part3/TutorialConfig.h.in

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#ifndef _TUTORIALCONFIG_H_
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#define _TUTORIALCONFIG_H_
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// the configured options and settings for Tutorial
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#define Tutorial_VERSION_MAJOR @Tutorial_VERSION_MAJOR@
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#define Tutorial_VERSION_MINOR @Tutorial_VERSION_MINOR@
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#cmakedefine USE_MYMATH
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#endif // _TUTORIALCONFIG_H_
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