1 #include <iostream> 2 #include <nlohmann/json.hpp> 3 4 using json = nlohmann::json; 5 main()6int main() 7 { 8 // create a JSON object 9 json j_object = {{"one", 1}, {"two", 2}}; 10 11 // call count() 12 auto count_two = j_object.count("two"); 13 auto count_three = j_object.count("three"); 14 15 // print values 16 std::cout << "number of elements with key \"two\": " << count_two << '\n'; 17 std::cout << "number of elements with key \"three\": " << count_three << '\n'; 18 } 19