Buffer is too small

Book::Book()
{
}
Book::Book(const char *name)
{
	this->bookname = new char[strlen(name) + 1];    //分配的空間要加一（/0）   Buffer is too small
	strcpy_s(this->bookname, strlen(name)+1, name); //要把/0也考進去           Buffer is too small
}

Book::~Book()
{
	if (bookname != NULL){
		delete []bookname;
		bookname = NULL;
	}
	cout << "析構函數被調用" << endl;
}