2. write a c or c++ program to perform the simulation: • instruct the user to make the following selections:  d: display date and time  u: unblock the queue  p: print the current status of process  t: print the process time and exit • option t can be only selected once. you need to use program to control it. • in option d, use the format mm dd year in the date and current time display. • in options u and p, you only need to print a string to show the process. we can fill in more in the next two labs. • in option t, you should make the program wait for strings and/or character(s) to calculate the time interval between the first and second processes. • hint: it is best to use structure in c++.