Error(s), warning(s):

source_file.java:17: error: cannot find symbol
ln=length();
   ^
  symbol:   method length()
  location: class Rextester
source_file.java:18: error: cannot find symbol
for(i=0;i<ln;i++)
    ^
  symbol:   variable i
  location: class Rextester
source_file.java:18: error: cannot find symbol
for(i=0;i<ln;i++)
        ^
  symbol:   variable i
  location: class Rextester
source_file.java:18: error: cannot find symbol
for(i=0;i<ln;i++)
             ^
  symbol:   variable i
  location: class Rextester
source_file.java:20: error: cannot find symbol
if(s.charAt(i)==" ")
            ^
  symbol:   variable i
  location: class Rextester
source_file.java:22: error: variable h is already defined in method main(String[])
String h=s.substring(p,i);
       ^
source_file.java:22: error: cannot find symbol
String h=s.substring(p,i);
                       ^
  symbol:   variable i
  location: class Rextester
source_file.java:23: error: cannot find symbol
q=h.compareto (s);
   ^
  symbol:   method compareto(String)
  location: variable h of type String
source_file.java:25: error: cannot find symbol
C++;
^
  symbol:   variable C
  location: class Rextester
9 errors