View Compilation Error

0_0_31379576_4817.cpp: In function 'int main()':
0_0_31379576_4817.cpp:7:6: error: conflicting declaration 'int a'
  int a;
      ^
0_0_31379576_4817.cpp:6:6: note: previous declaration as 'int a [1000]'
  int a[1000];
      ^
0_0_31379576_4817.cpp:19:10: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   if (n==a)
          ^