Explain the role of the three macros and the va_list data type that feature in the definition of a function using a variable number of arguments. Instead of designing a function that accepts a...

Explain the role of the three macros and the va_list data type that feature in the definition

of a function using a variable number of arguments.

Instead of designing a function that accepts a variable number of integers as arguments, can

we not use an array and pass its name and size to a function?