Compilare: user.cpp: In function ‘void radix()’: user.cpp:14:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( register int i = 0; i < sizeof( int ); ++i ) { ^ user.cpp: In function ‘int main()’: user.cpp:30:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( f, "%d%d%d%d", &N, &A, &B, &C ); ^