| #include <iostream> |
| #include <iomanip> |
| #include <nlohmann/json.hpp> |
| |
| using json = nlohmann::json; |
| |
| int main() |
| { |
| // create a JSON object |
| json object = |
| { |
| {"one", 1}, {"two", 2}, {"three", 2.9} |
| }; |
| |
| // output element with key "two" |
| std::cout << object["two"] << "\n\n"; |
| |
| // change element with key "three" |
| object["three"] = 3; |
| |
| // output changed array |
| std::cout << std::setw(4) << object << "\n\n"; |
| |
| // mention nonexisting key |
| object["four"]; |
| |
| // write to nonexisting key |
| object["five"]["really"]["nested"] = true; |
| |
| // output changed object |
| std::cout << std::setw(4) << object << '\n'; |
| } |