View Compilation Error

0_0_8863593_12755.cpp:3: error: `_int64' does not name a type
0_0_8863593_12755.cpp: In function `void func()':
0_0_8863593_12755.cpp:9: error: `arr' undeclared (first use this function)
0_0_8863593_12755.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8863593_12755.cpp: In function `int main()':
0_0_8863593_12755.cpp:19: error: `arr' undeclared (first use this function)