Compilare: user.cpp: In function ‘int* radixSort(int)’: user.cpp:5:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define NR_BYTES (sizeof(x[0])) ^ user.cpp:42:20: note: in expansion of macro ‘NR_BYTES’ for(i = 0; i < NR_BYTES; ++i) ^ user.cpp: In function ‘int main()’: user.cpp:17:40: 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:18:42: 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); ^ user.cpp:23:41: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d", &n, &A, &B, &C); ^