Compilare: user.c: In function ‘main’: user.c:21:6: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if((s<'a' || s>'z') && (s<'A' || s>'Z')) ^ user.c:17:7: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&q,sizeof(char),1,f); ^ user.c:18:7: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&s,sizeof(char),1,f); ^ user.c:30:9: warning: ignoring return value of ‘fread’, declared with attribute warn_unused_result [-Wunused-result] fread(&s,sizeof(char),1,f); ^