descfib.cpp: In function 'int param()': descfib.cpp:162: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result descfib.cpp: In function 'int main()': descfib.cpp:172: warning: unused variable 'i' descfib.cpp:169: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result descfib.cpp:170: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result /tmp/ccKunw3a.o: In function `param()': descfib.cpp:(.text+0x286): warning: the `gets' function is dangerous and should not be used.