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Here is a code snippet which can be used for reversing entire string/sentence or words in the the string/sentence. If you want to reverse a string entirely use delimiter as ‘\n’, if you want to reverse words use delimiter as ‘ ‘ space, or you can use any delimiter for custom reversing.

int reverse(char *string, char delimiter)
{
  char *src, *dest;
  char *temp = string;

  while( *temp )
  {
    if (*temp == delimiter)
    {
      temp++;
      continue;
    }

    src=dest=temp;
    while ( (*(dest+1) != delimiter) &&
            ( *(dest+1) != '\n' ) &&
            ( *(dest+1) != '\0' )) dest++;
    temp=dest+1;
    while( dest > src )
    {
      char tmp = *dest;
      *dest - - = *src;
      *src++=tmp;
    }
  }
  return 0;
}

int main()
{
    char name[] = "OpenAsthra -- a formula pattern";
    printf("%s\n",name);
    reverse(name,' '); /* space as delimiter,Reverse Words */
    printf("%s\n",name);
    reverse(name,'\n'); /* Reverse Complete Sentence */
    printf("%s\n",name);
}

download reversing words in string(in place) program [reverse_words.c]

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Related Blog Items

• Palindrome Checker
• Print In Reverse-Order
• String Pattern Matching: Write a function that checks for a given pattern at the end of a given string
• String to Integer (atoi)
• i64toa - Converts a 64 bit integer to string

This entry was written by ponnada and posted on December 22, 2006 at 1:16 pm and filed under C Tidbits. Bookmark the permalink. Follow any comments here with the RSS feed for this post. Post a comment or leave a trackback: Trackback URL.