View Compilation Error

0_0_29992653_31942.cpp: In function 'int main()':
0_0_29992653_31942.cpp:23:14: error: assignment of function 'std::ios_base& std::fixed(std::ios_base&)'
         fixed=1/sum;
              ^
0_0_29992653_31942.cpp:23:14: error: cannot convert 'double' to 'std::ios_base&(std::ios_base&)' in assignment