#includeint main(){char c; scanf("%c",&c); if(c>='A'&&c<='Z')printf("%c是大写字母\n",c); else if(c>='a'&&c<='z')printf("%c是小写字母\n",c); else if(c>='0'&&c<='9')printf("%c是数字\n",c); else printf("%c是其它字符\n",c);return 0;}