C99 s variadic functions can be wrapped in a variadic macro. This allows the use of a va_list which contains its own end-of-list sentinel. In this manner, you don t have to keep track of the quantity of elements in your list from caller to callee.-C99 s variadic functions can be wrapped in a variadic macro.　This allows the use of a va_list which contains its own end-of-list sentinel.　In this manner, you don t have to keep track of the quantity of elements in your list from caller to callee.