1#include <iostream>
2#include <nlohmann/json.hpp>
3
4using json = nlohmann::json;
5using namespace nlohmann::literals;
6
7int main()
8{
9    // create a JSON object with different entry types
10    json j =
11    {
12        {"integer", 1},
13        {"floating", 42.23},
14        {"string", "hello world"},
15        {"boolean", true},
16        {"object", {{"key1", 1}, {"key2", 2}}},
17        {"array", {1, 2, 3}}
18    };
19
20    // access existing values
21    int v_integer = j.value("/integer"_json_pointer, 0);
22    double v_floating = j.value("/floating"_json_pointer, 47.11);
23
24    // access nonexisting values and rely on default value
25    std::string v_string = j.value("/nonexisting"_json_pointer, "oops");
26    bool v_boolean = j.value("/nonexisting"_json_pointer, false);
27
28    // output values
29    std::cout << std::boolalpha << v_integer << " " << v_floating
30              << " " << v_string << " " << v_boolean << "\n";
31}
32