Question 20 1 pts How is the declaration and implementation of a function related? They are the same thing The declaration is the function name without a body functions must be implemented in an.h file The implementation is the function name without a body Question 21 1 pts What's the purpose of a makefile? A O to make you miserable O it explains where the compiler can be found O it outlines the dependancy relationships of the files in your project O it doesn't really do anything useful Question 22 1 pts What is useful about the getline() function? O it can be used to extract an entire line of input It can be set with a different delimeter it works with standard input as well as stringstreams and file input all of the above