cJson是一个老外写的解析代码。在其基础上，添加了cJSON_Direct.c，实现了C语言中结构体与json格式字符串相互转化的功能-cJson parsing code is written by a foreigner. On its basis, add cJSON_Direct.c to C language structure and JSON-formatted string into each other

json_decode parses a JSON string and returns a MATLAB object. JSON objects are converted to structures and JSON arrays are converted to cell arrays. NULL values are converted to empty logical. json_encode encodes a MATLAB object into a JSON string