文档解释ORA-12321:database(linknamestring)isnotopenandAUTO_MOUNTING=FALSECause:Thesecondarydatabasethatyourinstanceisattemptingtomountisnotopenandautomaticmountingh...

importjava.util.Scanner;//一个5位数，判断它是不是回文数。即12321是回文数，个位与万位相同，十位与千位相同。publicclassTest25{publicstaticvoidmain(String[]args){Scannersc=newScanner(System.in);intnum...

【Python练习题025】 一个5位数，判断它是不是回文数。即12321是回文数，个位与万位相同，十位与千位相同x=input('请输入任意位数的数字：')ifx==x[::-1]:    print('%s是个回文数'%x)else:  &nbs...