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I have run the example and got some result from example_simple.c in 
Triangulation_3. I don't understand what it means for the output.

I understood the first 8 lines. 
However what does it mean after that? Can someone explain to me?

The "output"
/********************************/
3
6
0 1 0
1 0 0
0 0 0
0 0 1
1 1 1
2 2 2
/// ?????
11
1 0 3 4
2 1 3 4
0 2 3 4
1 2 0 6
2 3 1 0
1 2 5 4
6 2 0 4
1 6 0 4
1 5 6 4
5 2 6 4
1 2 6 5
2 1 7 4
0 2 5 4
1 0 6 4
6 7 10 4
0 3 2 1
9 8 1 10
2 7 9 3
6 0 8 3
9 7 5 10
6 8 5 10
9 8 5 3
/********************************/


Repards,

Jackson