Problem 2 Writing with C/C++

Add a stack functionality to the class called addAll(): Pops all the values off the stack, sums them all up, and pushes the sum onto the stack. Utilize the functionalities that have already been implemented in class.

Problem 2 Add a stack functionality to the class called addAllo: Pops all the values off the stack, sums them all up, and pushes the sum onto the stack. Utilize the functionalities that have already been implemented in class. Problem 2 Add a stack functionality to the class called addAllo: Pops all the values off the stack, sums them all up, and pushes the sum onto the stack. Utilize the functionalities that have already been implemented in class