/in/foo.cc:18:62: error: stray '\344' in program
         build(a - (1 << (n - 1)), b + (1 << (n - 1)), n - 1);上面1个
                                                              ^
/in/foo.cc:18:63: error: stray '\270' in program
         build(a - (1 << (n - 1)), b + (1 << (n - 1)), n - 1);上面1个
                                                               ^
/in/foo.cc:18:64: error: stray '\212' in program
         build(a - (1 << (n - 1)), b + (1 << (n - 1)), n - 1);上面1个
                                                                ^
/in/foo.cc:18:65: error: stray '\351' in program
         build(a - (1 << (n - 1)), b + (1 << (n - 1)), n - 1);上面1个
                                                                 ^
/in/foo.cc:18:66: error: stray '\235' in program
         build(a - (1 << (n - 1)), b + (1 << (n - 1)), n - 1);上面1个
                                                                  ^
/in/foo.cc:18:67: error: stray '\242' in program
         build(a - (1 << (n - 1)), b + (1 << (n - 1)), n - 1);上面1个
                                                                   ^
/in/foo.cc:18:69: error: stray '\344' in program
         build(a - (1 << (n - 1)), b + (1 << (n - 1)), n - 1);上面1个
                                                                     ^
/in/foo.cc:18:70: error: stray '\270' in program
         build(a - (1 << (n - 1)), b + (1 << (n - 1)), n - 1);上面1个
                                                                      ^
/in/foo.cc:18:71: error: stray '\252' in program
         build(a - (1 << (n - 1)), b + (1 << (n - 1)), n - 1);上面1个
                                                                       ^
/in/foo.cc: In function 'void build(int, int, int)':
/in/foo.cc:19:9: error: expected ';' before 'build'
         build(a ,b + (1 << n), n - 1);//右边1个
         ^~~~~
/in/foo.cc:19:38: warning: statement has no effect [-Wunused-value]
         build(a ,b + (1 << n), n - 1);//右边1个
                                      ^