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							- #include <iostream>
 
- #include <nlohmann/json.hpp>
 
- using json = nlohmann::json;
 
- int main()
 
- {
 
-     try
 
-     {
 
-         // calling at() for a non-existing key
 
-         json j = {{"foo", "bar"}};
 
-         json k = j.at("non-existing");
 
-     }
 
-     catch (json::exception& e)
 
-     {
 
-         // output exception information
 
-         std::cout << "message: " << e.what() << '\n'
 
-                   << "exception id: " << e.id << std::endl;
 
-     }
 
- }
 
 
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