#include <iostream>
using namespace std;

class ClassA
{
	public:
		ClassA(char* string);
		ClassA();
	private:
		char* innerString;
};

ClassA::ClassA(char* string) : innerString(string)
{
	cout << this->innerString << endl;
}

ClassA::ClassA()
{
	cout << "parameterless constructor" << endl;
}

int main() {
	// your code goes here
	ClassA objA;
	ClassA obj("Hallo");
	return 0;
}