json使用的例子(jsoncpp)

json.txt中的内容：

{
	"name":"张三",
	"age":18,
	"身高":1.81,
	"生日":"2002-01-02",
	"学校":"北大青鸟",
	"专业":["厨师","挖掘机"],
	"单身":true,
	"地址":null
}

#include <iostream>
#include "../jsonlib/json.h"
#include <string>
#include <map>
#define BUFFER_SIZE 4096

int main()
{
	FILE* pFile = fopen("./json.txt", "r");
	if (pFile) {
		std::string buffer;
		buffer.resize(BUFFER_SIZE);
		memset((char*)buffer.c_str(), 0, BUFFER_SIZE);
		size_t len = fread((char*)buffer.c_str(), 1, BUFFER_SIZE, pFile);
		buffer.resize(len);
		fclose(pFile);
		Json::Value root;
		Json::Reader reader;
		if (reader.parse(buffer, root)) 
		{
			Json::Value::Members members = root.getMemberNames();
			for (unsigned i = 0; i < members.size(); i++)
			{
				switch (root[members[i]].type()) {
				case Json::intValue:
					std::cout << members[i] << "=i=>" << root[members[i]].asInt() << std::endl;
					break;
				case Json::stringValue:
					std::cout << members[i] << "=s=>" << root[members[i]].asString() << std::endl;
					break;
				default:
					std::cout << members[i] << "==>" << root[members[i]].toStyledString() << std::endl;
					break;
				}
			}
			std::string data = root.toStyledString();
			std::cout << data << std::endl;
		}
		root.clear();
		root["bool"] = false;
		root["array"] = Json::Value(Json::arrayValue);
		root["array"].append("hello");
		root["array"].append("world");
		std::cout << root.toStyledString();
	}
}

标签：pFile,buffer,Json,jsoncpp,BUFFER,json,例子,include
来源： https://blog.csdn.net/weixin_45834799/article/details/121709122