/in/foo.cc: In function 'int main()':
/in/foo.cc:9:26: error: expected ';' before '}' token
    9 |                 cin>>a[i]
      |                          ^
      |                          ;
   10 |         }
      |         ~                 
/in/foo.cc:16:26: warning: statement has no effect [-Wunused-value]
   16 |                         b-a[i];
      |                         ~^~~~~
/in/foo.cc:17:18: error: expected primary-expression before '<<' token
   17 |                 }<<endl
      |                  ^~
/in/foo.cc:19:16: error: expected ';' before 'return'
   19 |         cout<<s
      |                ^
      |                ;
   20 |     return 0;
      |     ~~~~~~