View Compilation Error

0_0_24188969_19109.cpp: In function 'int main()':
0_0_24188969_19109.cpp:145:33: error: cannot pass objects of non-trivially-copyable type 'std::string {aka class std::basic_string<char>}' through '...'
    while(~scanf ("%s%s",str,Tstr))
                                 ^
0_0_24188969_19109.cpp:145:33: error: cannot pass objects of non-trivially-copyable type 'std::string {aka class std::basic_string<char>}' through '...'