0_0_4499876_4343.cpp: In function `int gauss_cpivot(double (*)[55], int, double*)':
0_0_4499876_4343.cpp:17: error: `fabs' undeclared (first use this function)
0_0_4499876_4343.cpp:17: error: (Each undeclared identifier is reported only once for each function it appears in.)
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