foo.cc: In function ‘int main()’:
foo.cc:10:10: error: no match for ‘operator*’ (operand types are ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} and ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’})
   10 |     if((a*b)%2==0)
      |         ~^~
      |         | |
      |         | basic_string<[...]>
      |         basic_string<[...]>

正在同步测试数据，请稍后