jsoncpp构建json嵌套

你可以使用JsonCpp库来构建嵌套的JSON对象。下面是一个示例代码：

#include <iostream>
#include "json/json.h"

int main() {
    // 创建JSON对象
    Json::Value root;

    // 添加简单类型数据
    root["name"] = "John";
    root["age"] = 30;

    // 添加嵌套JSON对象
    Json::Value address;
    address["street"] = "Main Street";
    address["city"] = "New York";
    address["state"] = "NY";
    address["zip"] = "10001";
    root["address"] = address;

    // 添加嵌套JSON数组
    Json::Value hobbies(Json::arrayValue);
    hobbies.append("reading");
    hobbies.append("traveling");
    hobbies.append("photography");
    root["hobbies"] = hobbies;

    // 将JSON对象转换为字符串
    std::string json_str = root.toStyledString();
    std::cout << json_str << std::endl;

    return 0;
}

输出结果如下：

{
   "name" : "John",
   "age" : 30,
   "address" : {
      "street" : "Main Street",
      "city" : "New York",
      "state" : "NY",
      "zip" : "10001"
   },
   "hobbies" : [
      "reading",
      "traveling",
      "photography"
   ]
}