View Compilation Error

0_0_2960629_10282.cpp: In function `int main()':
0_0_2960629_10282.cpp:5: error: expected unqualified-id before "long"
0_0_2960629_10282.cpp:5: error: expected `,' or `;' before "long"
0_0_2960629_10282.cpp:6: error: `n' undeclared (first use this function)
0_0_2960629_10282.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)