mirror of
https://github.com/nlohmann/json
synced 2024-11-29 23:21:04 +00:00
40 lines
753 B
C++
40 lines
753 B
C++
#include <iostream>
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#include <iomanip>
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#include <nlohmann/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
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json j =
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{
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{"pi", 3.141},
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{"happy", true},
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{"name", "Niels"},
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{"nothing", nullptr},
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{
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"answer", {
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{"everything", 42}
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}
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},
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{"list", {1, 0, 2}},
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{
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"object", {
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{"currency", "USD"},
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{"value", 42.99}
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}
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}
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};
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// add new values
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j["new"]["key"]["value"] = {"another", "list"};
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// count elements
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auto s = j.size();
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j["size"] = s;
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// pretty print with indent of 4 spaces
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std::cout << std::setw(4) << j << '\n';
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}
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