Having the prototype available before the first use of the function allows the compiler to check that the correct number and type of arguments are used in the function call and that the returned value, if any, is being used reasonably. The function definition itself can act as an implicit function declaration.
While shellac is not usually the finish paint choice, it is often thought of as the best paint primer available. It has properties that oil and water based paints can't match, and provides a more dependable seal than most other primers are able to provide.
Conservators and restorers of antiques use shellac for re-finishing antiques. This text is designed to provide a thorough background in this unique product. To the average person, shellac has a jaded history of poor water and heat resistance, difficulties in application, poor drying, and limited durability.