View Compilation Error

104042_0_10040.cpp:5: error: `_int64' does not name a type
104042_0_10040.cpp: In function `int main()':
104042_0_10040.cpp:16: error: `f' undeclared (first use this function)
104042_0_10040.cpp:16: error: (Each undeclared identifier is reported only once for each function it appears in.)