json/doc/examples/count.cpp
2020-02-26 13:44:08 +08:00

19 lines
465 B
C++

#include <iostream>
#include <nlohmann/json.hpp>
using json = nlohmann::json;
int main()
{
// create a JSON object
json j_object = {{"one", 1}, {"two", 2}};
// call count()
auto count_two = j_object.count("two");
auto count_three = j_object.count("three");
// print values
std::cout << "number of elements with key \"two\": " << count_two << '\n';
std::cout << "number of elements with key \"three\": " << count_three << '\n';
}