常用数据结构及其模板

最近为了面试，在自写一些常用数据结构。目前打算写的包括BST,list,string，heap，并查集，Trie树。

string类模板

#include
#include
#pragma warning disable:4996
using namespace std;


class mystring {
private:
	char* data;
	int size;
public:
	mystring() {
		data = new char[1];
		data[0] = '\0';
		size = 0;
	}
	~mystring() {
		delete[]data;
	}
	mystring(const mystring& str) {
		size = str.size;
		data = new char[size + 1];
		strcpy(data, str.data);
	}
	mystring(const char* str) {
		size = strlen(str);
		data = new char[size + 1];
		strcpy(data, str);
	}
	mystring& operator=(const mystring& str) {
		if (&str == this) {
			return *this;
		}
		delete data;
		size = str.size;
		data = new char[size + 1];
		strcpy(data, str.data);
		return *this;
	}
	mystring& operator=(const char* str) {
		delete[]data;
		size = strlen(str);
		data = new char[size + 1];
		strcpy(data, str);
		return *this;
	}
	char& operator[](int i) {
		return data[i];
	}
	const char& operator[](int i)const {
		return data[i];
	}
	bool operator<(mystring& str) {
		return (strcmp(data, str.data) < 0);
	}
	bool operator>(mystring& str) {
		return str < *this;
	}
	bool operator==(mystring& str) {
		return strcmp(data, str.data) == 0;
	}
	friend ostream& operator<<(ostream& os, const mystring& st) {
		os << st.data;
		return os;
	}
	friend istream& operator >> (istream& is, mystring& st) {
		char tmp[100];
		is.get(tmp, 100);
		if (is)
			st = tmp;
		while (is&&is.get() != '\n')
			continue;
		return is;
	}
};

int main() {
	char* s1 = "abcdefg";
	mystring mystr2 = "ddddddd";
	mystring mystr(s1);
	bool a = mystr < mystr2;
	cout << "mystr << a << endl;

	cout << mystr<<endl;

	mystr = mystr2;
	
	cout << mystr << endl;

	bool b = mystr == mystr2;
	cout << "mystr==mystr2 " << b << endl;

	return 0;
}

BST

链表

Trie树