0_0_13040886_21505.cpp:1:10: #include expects "FILENAME" or <FILENAME>
0_0_13040886_21505.cpp:2:10: #include expects "FILENAME" or <FILENAME>
0_0_13040886_21505.cpp:3:10: #include expects "FILENAME" or <FILENAME>
0_0_13040886_21505.cpp:4:10: #include expects "FILENAME" or <FILENAME>
0_0_13040886_21505.cpp:5:10: #include expects "FILENAME" or <FILENAME>
0_0_13040886_21505.cpp: In function `int dcmp(double)':
0_0_13040886_21505.cpp:26: error: `fabs' undeclared (first use this function)
0_0_13040886_21505.cpp:26: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_13040886_21505.cpp: In function `double Length(Vector)':
0_0_13040886_21505.cpp:34: error: `sqrt' undeclared (first use this function)
0_0_13040886_21505.cpp: In function `double Angle(Vector, Vector)':
0_0_13040886_21505.cpp:35: error: `acos' undeclared (first use this function)
0_0_13040886_21505.cpp: In function `Vector Rotate(Vector, double)':
0_0_13040886_21505.cpp:41: error: `cos' undeclared (first use this function)
0_0_13040886_21505.cpp:41: error: `sin' undeclared (first use this function)
0_0_13040886_21505.cpp: In function `double DistanceToLine(Point, Point, Point)':
0_0_13040886_21505.cpp:57: error: `fabs' undeclared (first use this function)
0_0_13040886_21505.cpp: In function `double DistanceToSegment(Point, Point, Point)':
0_0_13040886_21505.cpp:65: error: `fabs' undeclared (first use this function)
0_0_13040886_21505.cpp: In function `int main()':
0_0_13040886_21505.cpp:100: error: `scanf' undeclared (first use this function)
0_0_13040886_21505.cpp:109: error: `printf' undeclared (first use this function)
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