#includeIn this example, we create a JSON object using the Json::Value class and set some key/value pairs. Then we create a Json::FastWriter object and call its write function to serialize the JSON object into a string. Finally, we print the string to the console. In general, the JSON for Modern C++ library provides a convenient and efficient way to work with JSON objects in C++. The library includes a variety of classes and functions to parse, manipulate, and serialize JSON data.#include int main() { Json::Value root; root["name"] = "John"; root["age"] = 30; root["city"] = "New York"; Json::FastWriter writer; std::string jsonStr = writer.write(root); std::cout << jsonStr << std::endl; return 0; }