creating new file using data base

this is my project

function[w]=check()
w=0;
q= input('Enter the name of file ','s');
switch(q)
    case('dk')
  if (exist('dk.wav') == 2)
 disp('File is presesnt ');
 w=w+1;
  end
    otherwise
        disp('File is not  presesnt ');
end

i just want that user will give name if that name is not present then it will create a new .wav file and come in case so that i can check like case ('dk') if new file has been created then that will automatically or by some way come in case (---) kindly guide me i shall be thank full to you

Answer 1

[KSSV]

filename = input('Enter the name of file with extension: ','s');
if exist(filename,'file')
    fprintf('%s file exists\n',filename)
else
    fprintf('%s file doesnot exist and I am creating\n',filename)
    data = rand(10,1) ;   % some data to write into file 
    save(filename,'data','-ascii')
end