/in/foo.cc: In function 'int main()':
/in/foo.cc:6:29: error: 'Setprecision' was not declared in this scope
  cout<<fixed<<Setprecision(2)<<"C="<<a+b<<" S="<<a*b;
                             ^
/in/foo.cc:7:6: warning: statement has no effect [-Wunused-value]
  cout;
      ^
/in/foo.cc:5:6: warning: unused variable 'c' [-Wunused-variable]
  int c,s,a,b;cin>>a>>b;
      ^
/in/foo.cc:5:8: warning: unused variable 's' [-Wunused-variable]
  int c,s,a,b;cin>>a>>b;
        ^