Implement a C++ function that swaps two integers, and use pointers as
arguments. Implement the other C++ function that computes the factorial of
the summation of the two integers using rvalue references as arguments. The
function of computing the factorial needs to be a recursive function.
Implement a C++ program that uses these functions. The user can input two
integers as 2 and 5, and the program needs to show the results of the
functions
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