For this assignment, prepare two related programs as .cpp files and submit them in a single zipped file.

Program #1 Instructions:

1. Write a simple program to validate passing by value and passing by reference.
2. Initialize a variable and display its value.
3. Pass the variable by value to a function. Change the value of the variable in the pass by value function. Display the modified value inside the function.
4. After the pass by value function returned, display the value again in the main function.
5. Pass the same variable, now passing by reference to another function. Change the value of the variable in the pass by reference function. Display the modified value inside the function.
6. After the pass by reference function returned, display the value again in the main function