View Compilation Error

0_0_24981277_20912.cpp: In function 'int main()':
0_0_24981277_20912.cpp:27:48: error: expected ',' or ';' before ')' token
             double ans=max(getans(l),getans(r)));
                                                ^
0_0_24981277_20912.cpp:28:20: error: redeclaration of 'double ans'
             double ans=max(ans,(4*b*d-c*c)/(4*b));
                    ^
0_0_24981277_20912.cpp:27:20: note: 'double ans' previously declared here
             double ans=max(getans(l),getans(r)));
                    ^