View Compilation Error

0_0_7484605_7985.cpp:3: error: `_int64' does not name a type
0_0_7484605_7985.cpp: In function `int main()':
0_0_7484605_7985.cpp:9: error: `s' undeclared (first use this function)
0_0_7484605_7985.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)