View Compilation Error

0_0_38416984_4438.cpp: In function 'int main()':
0_0_38416984_4438.cpp:57:43: error: 'ans' was not declared in this scope
         cout<<fixed<<setprecision(7)<<1.0*ans/base<<'\n';
                                           ^
0_0_38416984_4438.cpp:57:47: error: 'base' was not declared in this scope
         cout<<fixed<<setprecision(7)<<1.0*ans/base<<'\n';
                                               ^