What does the error message "no matching function for call to 'Order::Order()'" indicate?

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The error message "no matching function for call to 'Order::Order()'" indicates that there is no constructor defined for the class "Order" that takes zero arguments. This can occur when the class is instantiated or when an object of the class is created without providing the necessary arguments for its constructor. To resolve the error, the constructor for the class may need to be modified to include the missing arguments or a different constructor may need to be used that matches the provided arguments.