View Compilation Error

0_0_30478789_25877.cpp: In function 'int main()':
0_0_30478789_25877.cpp:76:27: error: cannot pass objects of non-trivially-copyable type 'std::string {aka class std::basic_string<char>}' through '...'
  while (scanf("%s%s", S, s) == 2)
                           ^
0_0_30478789_25877.cpp:76:27: error: cannot pass objects of non-trivially-copyable type 'std::string {aka class std::basic_string<char>}' through '...'