View Compilation Error

0_0_1532618_11096.cpp: In function `int main()':
0_0_1532618_11096.cpp:6: error: `_int64' does not name a type
0_0_1532618_11096.cpp:8: error: `a' undeclared (first use this function)
0_0_1532618_11096.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)