Graph Class Reference

A directed graph class with some algorithms built-in. More...

#include <graph.h>

List of all members.

Public Member Functions
void	addVertex (void)
	Adds a vertex.
void	addEdge (int target)
	Adds an edge starting at the last vertex.
int	countVertices (void) const
	Returns the number of vertices.
int	countEdges (void) const
	Returns the number of edges.
int	countEdges (int vertex) const
	Counts the number of edges leaving the given vertex.
int	getEdge (int vertex, int i) const
	Retrieves the given edge that leaves the given vertex.
bool	checkStronglyConnected () const
	Verifies if the graph is strongly connected.
bool	checkAperiodic () const
	Verifies if the graph is aperiodic.
Private Attributes
chomp::homology::diGraph	g
	The underlying graph object.

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Detailed Description

A directed graph class with some algorithms built-in.

This class defines a directed graph which is optimized for the particular application in this project. It supports a very limited number of operations, but these operations are very fast. This class also implements a few algorithms necessary in this project. This particular implementation is a wrapper for the class "diGraph" available in the CHomP software package. Note: The default constructor, destructor and assignment operator are good for this class, so none are defined.

Definition at line 63 of file graph.h.

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Member Function Documentation

void Graph::addVertex

(

void

)

[inline]

Adds a vertex.

Definition at line 99 of file graph.h.

References g.

void Graph::addEdge

(

int

target

)

[inline]

Adds an edge starting at the last vertex.

Note: The range of the target vertex number is not verified.

Definition at line 105 of file graph.h.

References g.

int Graph::countVertices

(

void

)

const [inline]

Returns the number of vertices.

Definition at line 111 of file graph.h.

References g.

Referenced by checkStronglyConnected().

int Graph::countEdges

(

void

)

const [inline]

Returns the number of edges.

Definition at line 116 of file graph.h.

References g.

Referenced by countEdges().

int Graph::countEdges

(

int

vertex

)

const [inline]

Counts the number of edges leaving the given vertex.

Definition at line 121 of file graph.h.

References countEdges(), and g.

int Graph::getEdge	(	int	vertex,
		int	i
	)			const [inline]

Retrieves the given edge that leaves the given vertex.

Definition at line 126 of file graph.h.

References g.

bool Graph::checkStronglyConnected

(

)

const [inline]

Verifies if the graph is strongly connected.

This function uses Tarjan's algorithm (as described in the Wikipedia) for the computation of strongly connected components in order to determine whether the given graph is strongly connected.

Tha advantage of this approach over the one described in Cormen's textbook is that the transposed graph need not be computed.

Definition at line 138 of file graph.h.

References countVertices(), and g.

bool Graph::checkAperiodic

(

)

const [inline]

Verifies if the graph is aperiodic.

Definition at line 145 of file graph.h.

References g.

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Member Data Documentation

chomp::homology::diGraph Graph::g [private]

The underlying graph object.

Definition at line 93 of file graph.h.

Referenced by addEdge(), addVertex(), checkAperiodic(), checkStronglyConnected(), countEdges(), countVertices(), and getEdge().

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The documentation for this class was generated from the following file:

• graph.h

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