Compilare: main.cpp: In function 'void radix_sort(const int&)': main.cpp:18:14: warning: unused variable 'j' [-Wunused-variable] for(int bk, j, i, step = 0, k = 1; step < 4; k *= base, ++step){ ^ main.cpp: In function 'int main()': main.cpp:46:37: 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); ^ main.cpp:47:39: 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); ^