504012a3db
As <iostream> is not included in json.hpp any more, all code examples need to include <iostream> now.
39 lines
761 B
C++
39 lines
761 B
C++
#include <iostream>
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#include <iomanip> // for std::setw
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#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
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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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