View Compilation Error

0_0_32097238_12365.cpp: In function 'bool check(db)':
0_0_32097238_12365.cpp:19:47: error: expected initializer before 'B'
   db K=1.0/a[n]-1.0/a[i]-1.0/b[n]+1.0/b[i],db B=1.0*s*(1.0/b[n]-1.0/b[i]),x=(-mid-B)/K;
                                               ^
0_0_32097238_12365.cpp:20:21: error: 'B' was not declared in this scope
   if(K>-eps&&K<eps&&B>eps) return 0;
                     ^
0_0_32097238_12365.cpp:21:19: error: 'x' was not declared in this scope
   if(K>0) R=min(R,x);
                   ^
0_0_32097238_12365.cpp:22:24: error: 'x' was not declared in this scope
   else if(K<0) L=max(L,x);
                        ^