Something

void String::movespaces ()
{
 //int i=len;
 int sum=0;
 int i=len-1;
 if (array[i]==' ')
 {    i--;
      int t=1;
      while(array[i]==' ') { t++; sum++; i--; }
      for (int i2=i+t; i2>=t; i2--) array[i2]=array[i2-t];
    }
 for (i; i>1; i--)
  {

   if (array[i]==' ' && array [i-1]==' ')
    { i--;
      int t=0;
      while(array[i]==' ') { t++; sum++; i--; }
      for (int i2=i+t; i2>=t; i2--) array[i2]=array[i2-t];
    }
  }
 for (int i2=0; i2<sum; i2++) array[i2]=' ';
}