[c-prog] reducing whitespace

[bbluthang]

Hi i'm trying to write some functions for a version of Eliza and can't
seem to find way to reduce multiple instances of whitespace to a
single instance -

while((line[i] != '\0') || (line[i] != '.'))
                {
/*This statement checks for two or more spaces together, 
by comparing the current character with the previous one.
If found, i is incremented, thereby skipping the multiple spaces. 
The result is then copied into 'cleaned'. */
                        
                 if((line[i] == ' ' && line[i-1] == ' '))
                        {
                        i = i + 1;
                        }
             cleaned[j] = line[i];
             j = j + 1;
             i = i + 1;
                }
                /*The 'cleaned' array, all lowercase and single spacing, is 
copied
back into 'line' */
      strcpy(line, cleaned);
          }    

I also tried - 

if((line[i] == ' ' && line[i-1] == ' '))
                        {
                        i = i + 1;
                        }
             line[j] = line[i];
             j = j + 1;
             i = i + 1;
                }

both ways give me a 'segmentation error' when i try to run the program.
I'd really appreciate a nudge to point me in the right direction
thanks
Andrew