Compilare: user.c: In function ‘main’: user.c:43:10: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(i_buf_p = i_buf, sizeof(char), sizeof(i_buf), f); ^ user.c: In function ‘adv’: user.c:11:14: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(i_buf_p = i_buf, sizeof(char), sizeof(i_buf), f); } ^