#include <iostream>
#include <string>
#include "vertex.h"
using std::ostream;
using std::string;

vertex::vertex() {}
vertex::vertex(const string nm) {}
vertex::vertex(const char* nm) {}
vertex::vertex(const vertex& v) {}
vertex& vertex::operator=(const vertex& v) {}
bool vertex::operator==(const vertex& v) const {}
bool vertex::operator!=(const vertex& v) const {}
bool vertex::operator<=(const vertex& v) const {}
bool vertex::operator>=(const vertex& v) const {}
bool vertex::operator<(const vertex& v) const  {}
bool vertex::operator>(const vertex& v) const  {}
ostream& operator<<(ostream& strm, const vertex& v) {}