I need some help with writing a shell script menu driven application. Am I correct that I have to write the codes first and save and then write the executable file? The menu has to have 4 choices. One choice allows the user to backup all of the files in their home directory into a special backup directory. If the backup directory does not exist, my script should create it. If the backup directory is not empty, a message should be displayed to the user that it is not empty and ask the user if they want to delete all files. If they say yes, delete the files and perform the backup. If they say no, display a message that the backup was not performed. Can someone please tell me how to begin with this project. I am using the sh shell. Am I going to first write the codes in vi editor and save? Any help is appreciated.

I am writing the source codes. Is the user answer going to use the output redirection operator >>? for example: std::cout << "Input Y for yes and N for no." << std:endl; is the next line going to be std::cout >> "read answer" >> std::endl; I really need help.