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D.13.2.53 ncones

Procedure from library gfan.lib (see gfan_lib).

Usage:
ncones(f); f fan

Return:
int, the number of cones in f

Example:
 
LIB "gfan.lib";
fan f=emptyFan(3);
ncones(f);
==> 0
intmat M1[3][3]=
1,0,0,
0,1,0,
0,0,1;
cone c1=coneViaPoints(M1);
insertCone(f,c1);
ncones(f);
==> 8
intmat M2[2][3]=
1,0,0,
0,-1,0;
cone c2=coneViaPoints(M2);
insertCone(f,c2);
ncones(f);
==> 10

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