json/doc/examples/operatorarray__key_type.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

32 lines
637 B
C++

#include <iostream>
#include <nlohmann/json.hpp>
using json = nlohmann::json;
int main()
{
// create a JSON object
json object =
{
{"one", 1}, {"two", 2}, {"three", 2.9}
};
// output element with key "two"
std::cout << object["two"] << "\n\n";
// change element with key "three"
object["three"] = 3;
// output changed array
std::cout << std::setw(4) << object << "\n\n";
// mention nonexisting key
object["four"];
// write to nonexisting key
object["five"]["really"]["nested"] = true;
// output changed object
std::cout << std::setw(4) << object << '\n';
}