View Compilation Error

0_0_10477558_9694.cpp: In function `double process()':
0_0_10477558_9694.cpp:77: error: `eps' undeclared (first use this function)
0_0_10477558_9694.cpp:77: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10477558_9694.cpp: At global scope:
0_0_10477558_9694.cpp:80: error: `const double eps' used prior to declaration