1 #include <iostream>
2 #include <nlohmann/json.hpp>
3
4 using json = nlohmann::json;
5
main()6 int main()
7 {
8 // create JSON values
9 json j_null;
10 json j_boolean = true;
11 json j_number_integer = 17;
12 json j_number_unsigned_integer = 12345678987654321u;
13 json j_number_float = 23.42;
14 json j_object = {{"one", 1}, {"two", 2}};
15 json j_array = {1, 2, 4, 8, 16};
16 json j_string = "Hello, world";
17 json j_binary = json::binary({1, 2, 3});
18
19 // call is_number()
20 std::cout << std::boolalpha;
21 std::cout << j_null.is_number() << '\n';
22 std::cout << j_boolean.is_number() << '\n';
23 std::cout << j_number_integer.is_number() << '\n';
24 std::cout << j_number_unsigned_integer.is_number() << '\n';
25 std::cout << j_number_float.is_number() << '\n';
26 std::cout << j_object.is_number() << '\n';
27 std::cout << j_array.is_number() << '\n';
28 std::cout << j_string.is_number() << '\n';
29 std::cout << j_binary.is_number() << '\n';
30 }
31