deploy: 40a62947d3

api/basic_json/front.md

@@ -39,13 +39,48 @@ Constant.
     The following code shows an example for `front()`.
      
     ```cpp
-    --8<-- "examples/front.cpp"
+    #include <iostream>
+    #include <nlohmann/json.hpp>
+    
+    using json = nlohmann::json;
+    
+    int main()
+    {
+        // create JSON values
+        json j_null;
+        json j_boolean = true;
+        json j_number_integer = 17;
+        json j_number_float = 23.42;
+        json j_object = {{"one", 1}, {"two", 2}};
+        json j_object_empty(json::value_t::object);
+        json j_array = {1, 2, 4, 8, 16};
+        json j_array_empty(json::value_t::array);
+        json j_string = "Hello, world";
+    
+        // call front()
+        //std::cout << j_null.front() << '\n';          // would throw
+        std::cout << j_boolean.front() << '\n';
+        std::cout << j_number_integer.front() << '\n';
+        std::cout << j_number_float.front() << '\n';
+        std::cout << j_object.front() << '\n';
+        //std::cout << j_object_empty.front() << '\n';  // undefined behavior
+        std::cout << j_array.front() << '\n';
+        //std::cout << j_array_empty.front() << '\n';   // undefined behavior
+        std::cout << j_string.front() << '\n';
+    }
+    
     ```
     
     Output:
     
     ```json
-    --8<-- "examples/front.output"
+    true
+    17
+    23.42
+    1
+    1
+    "Hello, world"
+    
     ```
 
 ## See also