View Compilation Error

0_0_29502216_5291.cpp: In function 'int dcmp(double)':
0_0_29502216_5291.cpp:22:13: error: 'eps' was not declared in this scope
     if(x < -eps) return -1;
             ^
0_0_29502216_5291.cpp:23:12: error: 'eps' was not declared in this scope
     if(x > eps) return 1;
            ^