cpputils utils for cpp(c++11) simple log example logf("DEBUG", "debug %s,%d", str,num); log("DEBUG")<<"debug "<<str<<","<<num<<std::endl; timer Timer t; int64_t e = t.Elapsed(); cout<< t.ElapsedStr(); random generator random_generator rg; size_t rand = rg.next<size_t>(1,5);