Compilare: user.c: In function ‘init_buf’: user.c:10:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(buf_p = buf, sizeof(char), sizeof(buf), f); } ^ user.c: In function ‘adv’: user.c:14:14: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(buf_p = buf, sizeof(char), sizeof(buf), f); } ^