0_0_11465626_19072.cpp:10:8: no macro name given in #ifndef directive
0_0_11465626_19072.cpp: In function `double cir_s(double, double, Vec, double)':
0_0_11465626_19072.cpp:123: error: `M_PI' undeclared (first use this function)
0_0_11465626_19072.cpp:123: error: (Each undeclared identifier is reported only once for each function it appears in.)
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