0_0_31832872_30957.cpp: In function 'int main()': 0_0_31832872_30957.cpp:7:38: error: cannot pass objects of non-trivially-copyable type 'std::string {aka class std::basic_string<char>}' through '...' while (scanf("%s%lf%lf",str,&n,&m)!=EOF) ^