descfib.cpp: In member function 'HugeN HugeN::operator=(const HugeN&)': descfib.cpp:89: warning: no return statement in function returning non-void descfib.cpp: In function 'int main()': descfib.cpp:92: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result descfib.cpp:93: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result descfib.cpp:95: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /tmp/cc34Pnzj.o: In function `main': descfib.cpp:(.text+0x201): warning: the `gets' function is dangerous and should not be used.