Compilare: user.cpp: In function ‘void radixSort()’: user.cpp:17:25: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] P[((V[i]>>p)&PER)] ++; ^ user.cpp:23:27: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] W[P[((V[i]>>p)&PER)]--] = V[i]; ^ user.cpp: In function ‘int main()’: user.cpp:34:42: 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:35:42: 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:37:42: 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); ^