Question:How to reduce the spaces between words.

[roy_ca]

I want to know how to reduce the spaces between words if they are separated by more than one spaces.
I know a little bit of it.After Scanning the string to see if a space is encountered,what am i supposed to do?

[twanvl]

You could use something like (pseudocode):

bool last_character_was_a_space = false;
for-each-character {
   if char == space {
      if last_character_was_a_space {
         remove_character;
      } else {
         keep_character;
         last_character_was_a_space = true;
      }
   } else {
      keep_character;
      last_character_was_a_space = false;
   }
}

The simplest way to handle the removing is to just append the characters you want to keep to a new string:

std::string result;
  ...
    //keep_character
    result += char;