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.
Traditional Shellac. Shellac is a penetrating varnish that's been used on American table tops since Colonial days. A shellac finish allows you to view the wood detail with remarkable clarity. Amber shellac provides the same clarity but it also adds warmth to light-colored woods such as pine or oak. properly protected wood table will last for generations, yet the table top is particularly vulnerable to scratching, scraping and moisture. Sealing that surface requires a tough, transparent water-resistant coating that highlights the beauty of the wood beneath.