foo.cc:6:2: error: stray '\342' in program
 }“Hello， world！”
  ^
foo.cc:6:3: error: stray '\200' in program
 }“Hello， world！”
   ^
foo.cc:6:4: error: stray '\234' in program
 }“Hello， world！”
    ^
foo.cc:6:10: error: stray '\357' in program
 }“Hello， world！”
          ^
foo.cc:6:11: error: stray '\274' in program
 }“Hello， world！”
           ^
foo.cc:6:12: error: stray '\214' in program
 }“Hello， world！”
            ^
foo.cc:6:19: error: stray '\357' in program
 }“Hello， world！”
                   ^
foo.cc:6:20: error: stray '\274' in program
 }“Hello， world！”
                    ^
foo.cc:6:21: error: stray '\201' in program
 }“Hello， world！”
                     ^
foo.cc:6:22: error: stray '\342' in program
 }“Hello， world！”
                      ^
foo.cc:6:23: error: stray '\200' in program
 }“Hello， world！”
                       ^
foo.cc:6:24: error: stray '\235' in program
 }“Hello， world！”
                        ^
foo.cc:6:5: error: 'Hello' does not name a type; did you mean 'ftello'?
 }“Hello， world！”
     ^~~~~
     ftello

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。