View Compilation Error

0_0_33462543_29693.cpp: In function 'int main()':
0_0_33462543_29693.cpp:49:15: error: cannot convert 'std::string {aka std::basic_string<char>}' to 'char*' for argument '1' to 'char* gets(char*)'
  while (gets(s)){//不能用~scanf("%s",&a),不能得到回车
               ^
0_0_33462543_29693.cpp:50:22: error: cannot convert 'std::string {aka std::basic_string<char>}' to 'const char*' for argument '2' to 'int strcmp(const char*, const char*)'
   if (!strcmp("\0", s)){
                      ^