buckaroo-nholmann-json-example/main.cpp at master · njlr/buckaroo-nholmann-json-example · GitHub

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#include <nlohmann/json.hpp>

using namespace nlohmann;

int main() {

// create an empty structure (null)

json j;

// add a number that is stored as double (note the implicit conversion of j to an object)

j["pi"] = 3.141;

// add a Boolean that is stored as bool

j["happy"] = true;

// add a string that is stored as std::string

j["name"] = "Niels";

// add another null object by passing nullptr

j["nothing"] = nullptr;

// add an object inside the object

j["answer"]["everything"] = 42;

// add an array that is stored as std::vector (using an initializer list)

j["list"] = { 1, 0, 2 };

// add another object (using an initializer list of pairs)

j["object"] = { {"currency", "USD"}, {"value", 42.99} };

// instead, you could also write (which looks very similar to the JSON above)

json j2 = {

{"pi", 3.141},

{"happy", true},

{"name", "Niels"},

{"nothing", nullptr},

{"answer", {

{"everything", 42}

}},

{"list", {1, 0, 2}},

{"object", {

{"currency", "USD"},

{"value", 42.99}

}}

};

return 0;

}