View Compilation Error

0_0_2724237_3078.cpp:7: error: `_int64' does not name a type
0_0_2724237_3078.cpp: In function `int bb()':
0_0_2724237_3078.cpp:10: error: `e' undeclared (first use this function)
0_0_2724237_3078.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_2724237_3078.cpp: In function `int main()':
0_0_2724237_3078.cpp:37: error: `_int64' undeclared (first use this function)
0_0_2724237_3078.cpp:37: error: expected `;' before "sum"
0_0_2724237_3078.cpp:39: error: `sum' undeclared (first use this function)
0_0_2724237_3078.cpp:39: error: `e' undeclared (first use this function)