View Compilation Error

0_0_8189194_23204.cpp: In function `int main()':
0_0_8189194_23204.cpp:8: error: `fib' undeclared (first use this function)
0_0_8189194_23204.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8189194_23204.cpp:13: error: `fin' undeclared (first use this function)