Compilare: user.cpp: In function ‘int main()’: user.cpp:52:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2; i<=n; i++) ^ user.cpp:70:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ^ user.cpp:74:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ^ user.cpp:79:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ^ user.cpp:87:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ^ user.cpp:93:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<=n; i++) ^ user.cpp:50:14: warning: unused variable ‘anterior’ [-Wunused-variable] unsigned int anterior,curent; ^ user.cpp:50:23: warning: unused variable ‘curent’ [-Wunused-variable] unsigned int anterior,curent; ^ user.cpp:42:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.in","r",stdin); ^ user.cpp:43:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("radixsort.out","w",stdout); ^