How do i call insert from main? - c++

Question

with the given code, How do i call insert from main?
I tried, but I always got error :expected primary-expression before.
what is the primary-expression exactly?
Object & front( )
{ return *begin( ); }
const Object & front( ) const
{ return *begin( ); }
Object & back( )
{ return *--end( ); }
const Object & back( ) const
{ return *--end( ); }
void push_front( const Object & x )
{ insert( begin( ), x ); }
void push_back( const Object & x )
{ insert( end( ), x ); }
void pop_front( )
{ erase( begin( ) ); }
void pop_back( )
{ erase( --end( ) ); }
// Insert x before itr.
iterator insert( iterator itr, const Object & x )
{
Node *p = itr.current;
theSize++;
return iterator( p->prev = p->prev->next = new Node( x, p->prev, p ) );
}

Answer 1

To call a function from main:
void My_Function()
{
std::cout << "My_Function\n"
}
int main()
{
My_Function();
return 0;
}
To call an object's method from main:
class Object
{
public:
void print() { std::cout << "Object\n";}
};
int main()
{
Object o;
o.print();
return 0;
}
You should be able to find these examples in some good C++ textbooks.
Edit 1: Static Object functions
You could also declare a method as static inside an object:
class Object_With_Static
{
public:
static void Print_Name()
{
std::cout << "Object_With_Static\n";
};
};
int main()
{
Object_With_Static::Print_Name();
return 0;
}