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digitalmars.D - String and listdir usage


I am new to D and trying out how to program in D. I am familiar with C and I am
now trying out D.

I changed a file example from std.file for listdir and allows user to NOT
specific path and in which the program will check if a path has been entered.
If not, it will prompt user for the path. I have not been able to get it to
work properly. I am trying to get used to D for key input. WOuld you pls help
to explain why, though when readln can read the input string, it cannot pass
the information to listdir to return the directory listing.

Thanks for your help and attention.
Jan 10 2008