Compilare: user.c: In function ‘main’: user.c:47:10: warning: variable ‘ch’ set but not used [-Wunused-but-set-variable] char ch; ^ user.c:51:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d ", &n); ^ user.c: In function ‘myfgetc’: user.c:10:14: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, BUF_SIZE, 1, fin); ^