| #include <iostream> |
| #include <nlohmann/json.hpp> |
| |
| using json = nlohmann::json; |
| |
| int main() |
| { |
| // create JSON object |
| json object = |
| { |
| {"the good", "il buono"}, |
| {"the bad", "il cattivo"}, |
| {"the ugly", "il brutto"} |
| }; |
| |
| // output element with key "the ugly" |
| std::cout << object.at("the ugly") << '\n'; |
| |
| // change element with key "the bad" |
| object.at("the bad") = "il cattivo"; |
| |
| // output changed array |
| std::cout << object << '\n'; |
| |
| |
| // exception type_error.304 |
| try |
| { |
| // use at() on a non-object type |
| json str = "I am a string"; |
| str.at("the good") = "Another string"; |
| } |
| catch (json::type_error& e) |
| { |
| std::cout << e.what() << '\n'; |
| } |
| |
| // exception out_of_range.401 |
| try |
| { |
| // try to write at a nonexisting key |
| object.at("the fast") = "il rapido"; |
| } |
| catch (json::out_of_range& e) |
| { |
| std::cout << e.what() << '\n'; |
| } |
| } |