#ifndef _DIGRAPH_CC
#define _DIGRAPH_CC

#include "Hash.cc"
#include "Digraph.h"

#include "test_utilities.h"

Digraph::~Digraph()
{
}

Digraph::Digraph()
{
}

Digraph::Digraph(const Digraph & g)
{
}

int Digraph::vertex_exists(int v) const 
{	
}

int Digraph::edge_exists(int from, int to) const  
{
}

Array<int> Digraph::out_nbrs(int v) const 
{
}

Array<int> Digraph::in_nbrs(int v) const 
{
}

int Digraph::add_vertex()  
{	
}

int Digraph::add_vertex(int id)  
{	
}

void Digraph::add_edge(int from, int to)  
{	
}

void Digraph::remove_edge(int from, int to)  
{	
}

void Digraph::remove_vertex(int v)
{	
}

Array<int> Digraph::vertices() const
{	
}

void Digraph::clear()  
{
}

Digraph& Digraph::operator=(const Digraph& g)
{
}

std::ostream& operator<<(std::ostream& out, const Digraph & g) 
{
}

#endif