/in/foo.cc: In function 'void Init()':
/in/foo.cc:15:19: warning: array subscript has type 'char' [-Wchar-subscripts]
             Map[ch][nCount + 65] = C;
                   ^
/in/foo.cc:25:20: warning: array subscript has type 'char' [-Wchar-subscripts]
             _Map[ch][nCount + 97] = C;
                    ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:35:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for (int i = 0; i < strC.length(); i++) {
                     ~~^~~~~~~~~~~~~~~
/in/foo.cc:41:27: warning: array subscript has type 'char' [-Wchar-subscripts]
                 if (Map[ch][ch_S] == ch_C) {
                           ^
/in/foo.cc:50:28: warning: array subscript has type 'char' [-Wchar-subscripts]
                 if (_Map[ch][ch_S] == ch_C) {
                            ^