View Compilation Error

0_0_5054522_10980.cpp: In function `int main()':
0_0_5054522_10980.cpp:12: error: `_int64' undeclared (first use this function)
0_0_5054522_10980.cpp:12: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5054522_10980.cpp:12: error: expected `;' before "sum"
0_0_5054522_10980.cpp:15: error: `sum' undeclared (first use this function)
0_0_5054522_10980.cpp:21: error: expected `;' before "boot"
0_0_5054522_10980.cpp:24: error: `boot' undeclared (first use this function)