View Compilation Error

0_0_9352128_13506.cpp: In function `double convex_poly_inter_area(point*, int, point*, int)':
0_0_9352128_13506.cpp:68: error: `seg_inter_pnt' undeclared (first use this function)
0_0_9352128_13506.cpp:68: error: (Each undeclared identifier is reported only once for each function it appears in.)