View Compilation Error

0_0_10778216_8090.cpp: In member function `bool Point::check()':
0_0_10778216_8090.cpp:32: error: `eps' undeclared (first use this function)
0_0_10778216_8090.cpp:32: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10778216_8090.cpp: In function `void Min_cover_circle()':
0_0_10778216_8090.cpp:51: error: `eps' undeclared (first use this function)