Determines the version or standard of C++ compiler

cpp_standard.cpp

#include <iostream>

int main(){
        #if __cplusplus==201402L
        std::cout << "C++14" << std::endl;
        #elif __cplusplus==201103L
        std::cout << "C++11" << std::endl;
        #elif __cplusplus==199711L
        std::cout << "C++07" << std::endl;
        #else
        std::cout << "No idea what standard of C++ it is!" << std::endl;
        #endif

        return 0;
}