View Compilation Error

0_0_13599449_17836.cpp: In function 'int dcmp(double, double)':
0_0_13599449_17836.cpp:138:13: error: 'eps' was not declared in this scope
     if(a-b<-eps)return -1;
             ^
0_0_13599449_17836.cpp:139:16: error: 'eps' was not declared in this scope
     return a-b>eps;
                ^