C++解析json文件

直接包含如下头文件即可

json.hpp

下载json.hpp

包含头文件后，声明命名空间nlohmann

测试代码 

#include 
#include 
#include 
#include "json.hpp"

using namespace nlohmann;

int main()
{
	//从json串读取
	std::string text = R"(
     {
         "Image": {
             "Width":  800,
             "Height": 600,
             "Title":  "View from 15th Floor",
             "Thumbnail": {
                 "Url":    "http://www.example.com/image/481989943",
                 "Height": 125,
                 "Width":  100
             },
             "Animated" : false,
             "IDs": [116, 943, 234, 38793]
         }
     }
     )";

	json root = json::parse(text);

	if (root.contains("Image"))
	{
		std::cout << root["Image"]["IDs"];
	}


	从文件读取
	//std::ifstream in("config.json",std::ios::binary);
	//json root = json::parse(in);
	//if (root.contains("Image"))
	//{
	//	std::cout << root["Image"]["IDs"];
	//}
}