Write  a program called memo that wraps commands that are to be executed, recording the command line arguments into a memo.history file. The wrapped command should be executed using system(). Ensure that these invocations are handled:

memo
program prints a numbered history of commands executed thus far, referring to what is stored in memo.history

memo
The specified command is executed and its invocation stored in memo.history

memo -e
When the user specifies the -e flag, it must be followed by a number, specifying the matching command from memo.history