View Compilation Error

0_0_8881511_6134.cpp:2: error: `_int64' does not name a type
0_0_8881511_6134.cpp: In function `int main()':
0_0_8881511_6134.cpp:15: error: `_int64' undeclared (first use this function)
0_0_8881511_6134.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8881511_6134.cpp:15: error: expected `;' before "sum"
0_0_8881511_6134.cpp:19: error: `sum' undeclared (first use this function)
0_0_8881511_6134.cpp:23: error: `JC' undeclared (first use this function)