View Compilation Error

0_0_27946425_17237.cpp: In function 'int main()':
0_0_27946425_17237.cpp:9:11: error: 'arr' was not declared in this scope
    cin >> arr[i];
           ^
0_0_27946425_17237.cpp:10:3: error: 'arr' was not declared in this scope
   arr[n] = x;
   ^