error: invalid conversion from 'int' to 'const char*' - c++

Question

I'm realising a stack data structure. When I call pop function in main function, an error appeared. It phrases like this:
stack.h:13: error: invalid conversion from 'int' to 'const char*'
stack.h:13: error: initializing argument 1 of 'int remove(const char*)
'
And the problem is that I didn't write the remove function with a char or a char* type parameter.
So I hope any of you can help me out of here. Thanks for the help!
template <typename T>
class Stack : public Vector<T> {
public:
Stack () { Vector<T>(); }
T pop() { return remove( this->size() - 1 ); } //stack.h:13
};
template <typename T>
class Vector {
protected:
int _size;
int _capacity;
T* _elem;
void shrink();
public:
T remove ( int r );
int remove ( int lo, int hi );
};
template <typename T>
int Vector<T>::remove ( int lo, int hi ) {
if(lo==hi) return 0;
while( hi < _size ) _elem[ lo++ ] = _elem[ hi++ ];
_size = lo;
shrink();
return hi-lo;
}
template <typename T>
T Vector<T>::remove ( int r ) {
T e = _elem[r];
remove ( r, r + 1 );
return e;
}
in main function,
Stack<int> S;
for(i = 0; i<n; i++) {
S.push(i+1);
}
S.pop();

Answer 1

Since the base class Vector<T> depends on the template parameter, and so has a type that isn't known until the template is instantiated, unqualified name lookup doesn't look there. This means that your unqualified call to remove doesn't resolve to the base-class member, but to some other overload (probably this one).
Write this->remove or Vector<T>::remove to indicate that you're referring to a member.