Code Snippet: Trim the unnecessary white space in a sentence.

Code Snippet: Trim the unnecessary white space in a sentence.

This code snippet is trying to trim the unnecessary white space in a sentence to use only one white space between each word.
The key idea of this code is move the rest of the string to the place just after the white space found each time.
QUITE simple but useful code snippet.

Running Enviroment: Visual C++ 2005 Express edition.

 1 //  string_trim.cpp : Defines the entry point  for  the console application.
 2 //
 3
 4 #include  " stdafx.h "
 5 #include  " string.h "
 6
 7 /*  The Modifications are Made  to  the Same  String   */
 8 void inside_trim(char *  x)
 9 {
10         unsigned  int  i,pos,nxtchar;
11  
12          for (i = 0 ;i < strlen(x);i ++ )
13         {
14                  if ( x[i]  ==   '  ' )
15                 {
16                         pos = i + 1 ;
17                         nxtchar = pos - 1 ;
18                          while (x[nxtchar ++ ]  ==   '  '){}
19  
20                         strcpy( & x[pos], & x[nxtchar - 1 ]);   //  move forward the rest of the whole  string !
21                         printf( " \n%s " ,x);
22                 }
23         }
24 }
25
26
27 int  _tmain( int  argc, _TCHAR *  argv[])
28 {
29         char xyz[] = " Does      this     work? " ;
30         printf( " \n%s " ,xyz);
31         inside_trim( & xyz[ 0 ]);
32         printf( " \n%s " ,xyz);
33     
34     return  0 ;
35 }
36
37

Running Result: