View Compilation Error

0_0_23644030_29224.cpp: In function 'int main()':
0_0_23644030_29224.cpp:5:3: error: '_int64' was not declared in this scope
   _int64 a[60];
   ^
0_0_23644030_29224.cpp:6:2: error: 'a' was not declared in this scope
  a[0] = 0;
  ^