View Compilation Error

0_0_21595086_25324.cpp:31:27: error: stray '#' in program
         index = str[i] - 'A';
                           ^
0_0_21595086_25324.cpp:31:33: error: stray '#' in program
         index = str[i] - 'A';
                                 ^
0_0_21595086_25324.cpp:86:30: error: stray '#' in program
         int index = str[i] -'A';
                              ^
0_0_21595086_25324.cpp:86:36: error: stray '#' in program
         int index = str[i] -'A';
                                    ^
0_0_21595086_25324.cpp: In function 'void insert(Node*, int, char*)':
0_0_21595086_25324.cpp:31:28: error: lvalue required as unary '&' operand
         index = str[i] - 'A';
                            ^
0_0_21595086_25324.cpp:31:31: error: 'A' was not declared in this scope
         index = str[i] - 'A';
                               ^
0_0_21595086_25324.cpp: In function 'void query(Node*)':
0_0_21595086_25324.cpp:86:31: error: lvalue required as unary '&' operand
         int index = str[i] -'A';
                               ^
0_0_21595086_25324.cpp:86:34: error: 'A' was not declared in this scope
         int index = str[i] -'A';
                                  ^