/in/foo.cc:10:14: error: stray '\357' in program
     cin>>a[i]，sum+=a[i];
              ^
/in/foo.cc:10:15: error: stray '\274' in program
     cin>>a[i]，sum+=a[i];
               ^
/in/foo.cc:10:16: error: stray '\214' in program
     cin>>a[i]，sum+=a[i];
                ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:10:17: error: expected ';' before 'sum'
     cin>>a[i]，sum+=a[i];
                 ^~~