json/doc/examples/README.cpp
Niels Lohmann 0258484626
🔖 set version to 3.1.0
- updated documentation wrt. new repository layout
- temporarily switched off Homebrew --HEAD building (can only be switched on after release)
- set copyright date to 2018
2018-02-01 22:20:26 +01:00

38 lines
734 B
C++

#include <iostream>
#include <nlohmann/json.hpp>
using json = nlohmann::json;
int main()
{
// create a JSON object
json j =
{
{"pi", 3.141},
{"happy", true},
{"name", "Niels"},
{"nothing", nullptr},
{
"answer", {
{"everything", 42}
}
},
{"list", {1, 0, 2}},
{
"object", {
{"currency", "USD"},
{"value", 42.99}
}
}
};
// add new values
j["new"]["key"]["value"] = {"another", "list"};
// count elements
auto s = j.size();
j["size"] = s;
// pretty print with indent of 4 spaces
std::cout << std::setw(4) << j << '\n';
}