View Compilation Error

0_0_4561826_7998.cpp: In function `int main()':
0_0_4561826_7998.cpp:11: error: expected unqualified-id before "long"
0_0_4561826_7998.cpp:11: error: expected `,' or `;' before "long"
0_0_4561826_7998.cpp:18: error: `a' undeclared (first use this function)
0_0_4561826_7998.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4561826_7998.cpp:18: error: `b' undeclared (first use this function)
0_0_4561826_7998.cpp:20: error: `ans' undeclared (first use this function)
0_0_4561826_7998.cpp:28: error: `leave' undeclared (first use this function)
0_0_4561826_7998.cpp:30: error: `flight' undeclared (first use this function)