/in/foo.cc: In function 'int main()':
/in/foo.cc:7:12: warning: right operand of comma operator has no effect [-Wunused-value]
   cin>> a,b;
            ^
/in/foo.cc:8:36: warning: 'b' is used uninitialized in this function [-Wuninitialized]
   cout<<fixed<<setprecision(2)<<a+a*b/100;
                                   ~^~