PLEASE I NEED THESE ANSWERS ASAP.

Write the C++ code that reads an integer from the user named input. The integer is then passed to a function named absoluteValue as a pointer and the value of input is updated. Do not pass by reference, pass a pointer. The absolute value of a number x is defined as

|x|= x if x 0

x otherwise

Write a void function using two type integer call-by-reference parameters that swaps the values in the arguments. Be sure to include testable pre and post conditions.

Write a class definition for a sandwich. It should have sandwich name and type Include the mutator and accessor functions for both of those member variables.

Write an overloaded function called sum. The first function should accept two doubles that adds them together. The second function should accept three doubles that adds them together.