View Compilation Error

0_0_30549316_17301.cpp: In function 'int main()':
0_0_30549316_17301.cpp:9:2: error: '_int64' was not declared in this scope
  _int64 a,arr[60];
  ^
0_0_30549316_17301.cpp:10:2: error: 'arr' was not declared in this scope
  arr[0] = 0;
  ^
0_0_30549316_17301.cpp:12:16: error: 'a' was not declared in this scope
  while (cin >> a)
                ^