more documentation

doc/examples/basic_json__CompatibleIntegerNumberType.cpp

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+#include <json.hpp>
+
+using namespace nlohmann;
+
+int main()
+{
+    // create values of different integer types
+    short n42 = 42;
+    int n23 = 23;
+    long n1024 = 1024;
+    int_least32_t n17 = 17;
+    uint8_t n8 = 8;
+
+    // create JSON numbers
+    json j42(n42);
+    json j23(n23);
+    json j1024(n1024);
+    json j17(n17);
+    json j8(n8);
+
+    // serialize the JSON numbers
+    std::cout << j42 << '\n';
+    std::cout << j23 << '\n';
+    std::cout << j1024 << '\n';
+    std::cout << j17 << '\n';
+    std::cout << j8 << '\n';
+}

doc/examples/basic_json__CompatibleIntegerNumberType.output

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+42
+23
+1024
+17
+8

doc/examples/basic_json__number_float_t.cpp

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+#include <json.hpp>
+
+using namespace nlohmann;
+
+int main()
+{
+    // create values of different floating-point types
+    json::number_float_t v_ok = 3.141592653589793;
+    json::number_float_t v_nan = NAN;
+    json::number_float_t v_infinity = INFINITY;
+
+    // create JSON numbers
+    json j_ok(v_ok);
+    json j_nan(v_nan);
+    json j_infinity(v_infinity);
+
+    // serialize the JSON numbers
+    std::cout << j_ok << '\n';
+    std::cout << j_nan << '\n';
+    std::cout << j_infinity << '\n';
+}

doc/examples/basic_json__number_float_t.output

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+3.14159265358979
+null
+null

doc/examples/basic_json__number_integer_t.cpp

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+#include <json.hpp>
+
+using namespace nlohmann;
+
+int main()
+{
+    // create a JSON number from number_integer_t
+    json::number_integer_t value = 42;
+
+    json j(value);
+
+    // serialize the JSON numbers
+    std::cout << j << '\n';
+}

doc/examples/basic_json__number_integer_t.output

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+42