/in/foo.cc: In function 'int main()':
/in/foo.cc:7:9: warning: unused variable 'b' [-Wunused-variable]
   float b=0;
         ^
/in/foo.cc:9:43: error: expected '}' at end of input
   cout<<fixed<<setprecision<<(4)<<a*9/5+32;
                                           ^