What will be the output of the following C++ code?

#include <iostream>
using namespace std;
template <class T>
class A
{
    public:
    A(int a): x(a) {}
    protected:
    int x;
};
template <class T>
class B: public A<char>
{
    public:
    B(): A<char>::A(100) 
    {
        cout << x * 2 << endl;
    }
};
int main()
{
    B<char> test;
    return 0;
}