New C++/CMake project

CMakeLists.txt

cmake_minimum_required(VERSION 3.19)

project(ProjectName_ChangeMe VERSION 0.1 LANGUAGES CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

project(${PROJECT_NAME})

# add_subdirectory(src)

#
# Testing

include(CTest) # note: this adds a BUILD_TESTING which defaults to ON

if(BUILD_TESTING)
  add_subdirectory(tests)
endif()

main.cpp

#include <iostream>
#include <iomanip>
#include <cstdlib>
 
int main(int argc, char *argv[])
{
    std::cout << "argc == " << argc << '\n';
 
    for(int ndx{}; ndx != argc; ++ndx) {
        std::cout << "argv[" << ndx << "] == " << std::quoted(argv[ndx]) << '\n';
    }
    std::cout << "argv[" << argc << "] == "
              << static_cast<void*>(argv[argc]) << '\n';
    /*...*/
    return argc == 3 ? EXIT_SUCCESS : EXIT_FAILURE; // optional return value
}