#include "rapidjson/reader.h" #include "rapidjson/istreamwrapper.h" #includeIn this example, we first create a std::ifstream object to read from a file called "example.json". Then, we create an IStreamWrapper object which wraps the ifstream object and allows it to be used as a continuous input stream for the RapidJSON parser. We then create a Reader object and call its Parse method with the IStreamWrapper object as the parameter. If the JSON data in the file is valid and can be parsed successfully, the Parse method returns a ParseResult object with a Code of kParseErrorNone. If there is an error in the JSON data, such as a syntax error or invalid data type, the Parse method returns a ParseResult object with a Code indicating the type of error and an Offset indicating the position in the input stream where the error occurred.using namespace rapidjson; int main() { std::ifstream ifs("example.json"); IStreamWrapper isw(ifs); Reader reader; ParseResult parseResult = reader.Parse(isw); if (!parseResult) { fprintf(stderr, "JSON parse error: %s (%u)\n", GetParseError_En(parseResult.Code()), parseResult.Offset()); return 1; } // Do something with the parsed JSON... }