C++实例 MySTLString

#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;
}