View Compilation Error

0_0_6206938_6991.cpp:2: error: `_int64' does not name a type
0_0_6206938_6991.cpp: In function `int main()':
0_0_6206938_6991.cpp:13: error: `hdu1465' undeclared (first use this function)
0_0_6206938_6991.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)