C#

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#include "argedit.h"<br />
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#include "allocpool.h"<br />
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template <class Node, class Edge><br />
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class StreamARGLoader: public ARGEdit<br />
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{	public:<br />
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		typedef Allocator<Node> NodeAllocator;<br />
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		typedef Allocator<Edge> EdgeAllocator;<br />
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		StreamARGLoader(NodeAllocator *nalloc, EdgeAllocator *ealloc, <br />
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			                      istream &in);<br />
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		static void write(ostream &out, ARGraph<Node, Edge> &g);<br />
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		static void write(ostream &out, ARGLoader &g);<br />
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	private:<br />
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		enum { MAX_LINE=512 };<br />
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		void readLine(istream &in, char *line);<br />
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		int  readCount(istream &in);<br />
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		void readNode(NodeAllocator *alloc, istream &in);<br />
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		void readEdge(EdgeAllocator *alloc, istream &in);<br />
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};

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int main()<br />
  { // Create the allocators<br />
    NewAllocator<Point> node_allocator;<br />
    NullAllocator<Empty> edge_allocator;<br />
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    // Open the file<br />
    ifstream in("graph.txt");<br />
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    // Create the ARGLoader<br />
    StreamARGLoader<Point, Empty> loader(&node_allocator, <br />
                                         &edge_allocator, <br />
                                         in);<br />
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    // Build the graph<br />
    ARGraph<Point, Empty> graph(&loader);<br />
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    //......