Modify the copy program developed in Program 16.6 so that it can accept more than one source file to be copied into a directory, like the standard UNIX cp command. So, the command $ copy copy1.m...

Modify the copy program developed in Program 16.6 so that it can accept more than one source file to be copied into a directory, like the standard UNIX cp command. So, the command $ copy copy1.m file1.m file2.m progs should copy the three files copy1.m, file1.m, and file2.m into the directory progs. Be sure that when more than one source file is specified, the last argument is, in fact, an existing directory.