/in/foo.cc: In function 'int main()':
/in/foo.cc:2:12: error: expected ']' before ';' token
 #define N 0;
            ^
/in/foo.cc:7:8: note: in expansion of macro 'N'
  int a[N];
        ^
/in/foo.cc:7:9: error: expected primary-expression before ']' token
  int a[N];
         ^
/in/foo.cc:11:15: error: 'a' was not declared in this scope
   scanf("%d",&a[i]);
               ^
/in/foo.cc:13:6: error: 'a' was not declared in this scope
  max=a[0];
      ^