Re: Error message

Hi I am doing a program oveloraded operator.
I am having a few errors on it.

Error1: request for member `insertElement' in `S1set', which is of non-
class type `IntegerSet[26]'

Error2: no matching function for call to `IntegerSet::operator+
(IntegerSet[26])'

Here is my program:

class IntegerSet
{
private:
       bool set[26];
       int element;

public:
      //Operator methods.
      IntegerSet operator + (const IntegerSet &)const; //Method
union

      //Methods
      IntegerSet(); //default
Constructor
      IntegerSet(int x[], int k); //Overload
constructor

      bool isValid(int)const;
      void insertElement(int);
      void deleteElement(int);
      void setString();
      void inputSet();
};

IntegerSet set();

IntegerSet::IntegerSet()
{
   for(element=0; element>=25; element++)
       set[element]= false;
}

IntegerSet::IntegerSet(int x[], int k)
{
   for(element=0; element>=25; element++)
       set[element]= false;
   for(int j=0; j<k; j++)
   {
           element=x[j];
           set[element]= true;
   }
}

bool IntegerSet::isValid(int i)const
{
    return set[i];
}

//insert element to a set
void IntegerSet::insertElement(int element)
{
    set[element]=true;
}

//delete element of a set
void IntegerSet::deleteElement(int element)
{
    set[element]=false;
}

//overloaded operator + to compute the union of two sets
IntegerSet IntegerSet::operator+(const IntegerSet &right)const
{
     IntegerSet j;

     for(int element=0; element<=25; element++)
     {
             if(isValid(element) || right.isValid(element))
                   j.insertElement(element);
     }
     return j;
}

int main()
{
 IntegerSet run;
 IntegerSet S1set[26];
 IntegerSet S2set[26];
 IntegerSet S3set[26];
 IntegerSet Sset[26];

 for(int i=2; i< ; i+2)
         S1set.insertElement(); <--Error 1