View Compilation Error

397138_0_0_7946.cpp: In function `int main()':
397138_0_0_7946.cpp:4: error: `_int64' does not name a type
397138_0_0_7946.cpp:6: error: `a' undeclared (first use this function)
397138_0_0_7946.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)