Programming language is C.

Write a program that contains both a main function and a function called swap. Your main program should read in two integer values from the keyboard and then call the function swap. The swap function will swap the original values and then return back to main. The function main will then output the values contained in the original variables. The original values should be swapped. No global variables are to be used. You must simulate call by reference by passing the address of the variables to the function swap. You must be able to do this. Do not use an array. I want you to practice using the address operator (&) and the dereference operator (*). You need to learn how to deal with pointers as a simulation of call by reference in C.