#include <iostream>

#include <cstring>

#include <string>

using namespace std;

class MySTLString

{

	public:

		MySTLString();

		MySTLString(int count, char ch);

		MySTLString(const char* s);

		const char& front() const;

		const char& back() const;

		int size() const;

	private:

		char* data_;

};

MySTLString :: MySTLString() : data_(new char[1])

{

	*data_ = '\0';

}

MySTLString :: MySTLString(const char* s) : data_(new char[strlen(s) + 1])

{

	strcpy(data_, s);

}

const char& MySTLString::front() const

{

	return data_[0];

}

int MySTLString::size() const

{

	return strlen(data_);

}

int main(void)

{

	MySTLString str("Hello");

	cout << str.front() << endl;

	cout << str.size()<<endl;

	return 0;

}