Concat two linked lists

[iDontGetIt]

Can someone help me get this started? I need to write a program that concatenates two linked lists. I am getting some interesting errors.

It is defined in my header like so:

List<T>& operator+(const List<T>&)const;

It is energized below like this:

template<typename T>
List<T>& List<T>::operator+(const List<T> & rhs)const
{
	List<T> left = new List<T>;
	List<T> right = new List<T>;

	left = this;
	right = rhs;

         //For testing purposes
	cout << "L: " << left << endl;
	cout << "R: " << right << endl;
}

That's all I have so far. I get this error:

1>C:\Users\dumpledork\Desktop\List\ListTestMain.cpp(27): error C2679: binary '+' : no operator found which takes a right-hand operand of type 'int' (or there is no acceptable conversion)
1>          c:\users\dumpledork\desktop\list\List.h(16): could be 'List<T> &List<T>::operator +(const List<T> &) const'
1>          with
1>          [
1>              T=char
1>          ]
1>          while trying to match the argument list '(List<T>, int)'
1>          with
1>          [
1>              T=char
1>          ]
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

[vlad from moscow]

Next time show the statement that issues the error!
And your overloaded operator returns nothing.

[iDontGetIt]

Hi Vlad,

Sorry, here is my driver:

#include "List.h"

int main() {
	
	List<char> l1, l2;
	
	for (int i=0; i<10; i++)
		l1.insertAtFront('c'+i);

	for (int i=0; i<5; i++)
		l2.insertAtFront('j'+i);

	cout << "Test concat opr" << endl;
	List<char> l3 = l1 + 12;

This last line is the first error (List<char> l3 = l1 + 12;). The second error references the first snippet of code that I posted above, the header declaration.

If I return a list obj, the error doesn't change. I was thinking the error was in my header or on line 2.

Whats confusing to me is that it says cannot find operand of type 'int'. I am working with chars in this case, and I thought that it shouldnt matter whether I'm passing chars or ints because I have it templated.