descfib.cpp: In function 'int main()': descfib.cpp:150: warning: unused variable 'cnt' descfib.cpp:147: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result descfib.cpp:148: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result descfib.cpp: In function 'int fake_upper_bound()': descfib.cpp:143: warning: control reaches end of non-void function descfib.cpp: In function 'int fake_lower_bound()': descfib.cpp:134: warning: control reaches end of non-void function