View Compilation Error

810971_0_0_14942.cpp: In function `int main()':
810971_0_0_14942.cpp:13: error: `_int64' undeclared (first use this function)
810971_0_0_14942.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
810971_0_0_14942.cpp:13: error: expected `;' before "n"
810971_0_0_14942.cpp:18: error: `n' undeclared (first use this function)