View Compilation Error

0_0_38275128_638.cpp: In function 'int main()':
0_0_38275128_638.cpp:4:2: error: '_int64' was not declared in this scope
  _int64 a[51];
  ^
0_0_38275128_638.cpp:5:2: error: 'a' was not declared in this scope
  a[0] = 0;
  ^