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As I learned in https://github.com/melpon/wandbox/issues/209, this library is already installed at Wandbox, so we need to adjust the examples to use `#include "json.hpp"` insteas of `#include <json.hpp>`.
30 lines
842 B
C++
30 lines
842 B
C++
#include "json.hpp"
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using json = nlohmann::json;
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int main()
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{
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// create a JSON object with different entry types
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json j =
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{
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{"integer", 1},
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{"floating", 42.23},
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{"string", "hello world"},
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{"boolean", true},
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{"object", {{"key1", 1}, {"key2", 2}}},
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{"array", {1, 2, 3}}
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};
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// access existing values
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int v_integer = j.value("/integer"_json_pointer, 0);
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double v_floating = j.value("/floating"_json_pointer, 47.11);
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// access nonexisting values and rely on default value
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std::string v_string = j.value("/nonexisting"_json_pointer, "oops");
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bool v_boolean = j.value("/nonexisting"_json_pointer, false);
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// output values
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std::cout << std::boolalpha << v_integer << " " << v_floating
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<< " " << v_string << " " << v_boolean << "\n";
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}
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