View Compilation Error

0_0_3092426_24619.cpp:5: error: `_int64' does not name a type
0_0_3092426_24619.cpp: In function `int main()':
0_0_3092426_24619.cpp:30: error: `mifeng' undeclared (first use this function)
0_0_3092426_24619.cpp:30: error: (Each undeclared identifier is reported only once for each function it appears in.)