Remove extra white spaces in C++

Question

I tried to write a script that removes extra white spaces but I didn\'t manage to finish it.

Basically I want to transform abc sssd g g sdg gg gf into

Answer 1

I don't know if this helps but this is how I did it on my homework. The only case where it might break a bit is when there is spaces at the beginning of the string EX " wor ds " In that case, it will change it to " wor ds"

void ShortenSpace(string &usrStr){
   char cha1;
   char cha2;
   for (int i = 0; i < usrStr.size() - 1; ++i) {
      cha1 = usrStr.at(i);
      cha2 = usrStr.at(i + 1);
      
      if ((cha1 == ' ') && (cha2 == ' ')) {
         usrStr.erase(usrStr.begin() + 1 + i);
         --i;//edit: was ++i instead of --i, made code not work properly
      }
   }
}