foo.cc: In function 'void Test()':
foo.cc:11:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
11 | for (int i = 0; i < a.length(); i++)
| ~~^~~~~~~~~~~~
foo.cc:16:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
16 | for (j = 0; j < a1.length(); j++)
| ~~^~~~~~~~~~~~~
foo.cc:24:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
24 | if (j == a1.length())
| ~~^~~~~~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务