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.
Shellac is a clear gloss finish that comes from the secretion of an insect and is mixed with alcohol. It comes in many colors and can be used either as a finish or as a sealer. It dries very fast but is also easily damaged. It also tends to define the woodâs grains and color, and gives it a warm feel.