Compilare: user.cpp: In function ‘void read()’: user.cpp:7: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:8: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:9: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void rez()’: user.cpp:41: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp: In function ‘int palind()’: user.cpp:33: warning: control reaches end of non-void function /tmp/cc7f1eGS.o: In function `rez()': user.cpp:(.text+0xcf): warning: the `gets' function is dangerous and should not be used.