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extern "C" double sqrt (double __x) throw (); typedef double VECTOR[3]; enum { X = 0, Y = 1, Z = 2, T = 3 }; inline void VLength(double& a, const VECTOR b) { a = sqrt(b[X] * b[X] + b[Y] * b[Y] + b[Z] * b[Z]); } int All_Torus_Intersections(void) { double len; VECTOR D; VLength(len, D); VLength(len, D); }