Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:35:15: error: ‘strrev’ was not declared in this scope strrev(aux); ^ user.cpp:30:15: warning: unused variable ‘k’ [-Wunused-variable] int i, j, k; ^ user.cpp:28:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("palindrom2.in", "r", stdin); ^ user.cpp:29:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("palindrom2.out", "w", stdout); ^ user.cpp:31:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", s); ^