Please write this in c/c++

2. (20 pts) Write a simple single thread CSC4420 shell, i.e., no concurrent commands, to support at least the following built-in commands o prompt can set to any string you input. in addition to the current history event number, ie. %h as in csh: o url list the course web site o hour list class times o room list classroom location o desp : list the description of this course o text list the textbook o ref list the reference books o prof: list the professor's name o pol : professor's office location o poh : professor's office hours o pma : professor's email address o ta list the TA's name o tol TA's office location o toh : TA's office hours o tma TA's email address o history : list history of events up to the number you set o help : list all the available commands o exit or quit : exit CSC4420 shell