View Compilation Error

0_0_32753917_26988.cpp: In function 'int main()':
0_0_32753917_26988.cpp:43:31: error: cannot pass objects of non-trivially-copyable type 'std::string {aka class std::basic_string<char>}' through '...'
     while (scanf("%s %s",s1,s2) != EOF) {
                               ^
0_0_32753917_26988.cpp:43:31: error: cannot pass objects of non-trivially-copyable type 'std::string {aka class std::basic_string<char>}' through '...'
0_0_32753917_26988.cpp:61:1: error: expected '}' at end of input
 }
 ^