/in/foo.cc:6:11: error: stray '\357' in program
  cin>>A>>B；
           ^
/in/foo.cc:6:12: error: stray '\274' in program
  cin>>A>>B；
            ^
/in/foo.cc:6:13: error: stray '\233' in program
  cin>>A>>B；
             ^
/in/foo.cc:7:14: error: stray '\357' in program
     cout<<A+B；
              ^
/in/foo.cc:7:15: error: stray '\274' in program
     cout<<A+B；
               ^
/in/foo.cc:7:16: error: stray '\233' in program
     cout<<A+B；
                ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:7:5: error: expected ';' before 'cout'
     cout<<A+B；
     ^~~~