OK Thank you very much!!!

Hello everyone: May I ask Java Web questions in there?? Thank you very much.

Thank you very much!!!

:) Hi, everyone May I ask a questions?? C++ is my first language but I now I need to learn Java. C++ supports multiple inheritance. Example: Class c Protected class a(), class b() { } But Java doesn't support multiple inheritance. Java use interface to implement multiple inheritance. My question is how to use interface to achieve multiple inheritance. Thank you very much.

Print the inverse number. Ex: 2178*4=8712 Write down a program which can satisfy the prerequisite and print out the screen. The answer is: [code]

void inverse2 ()
{
int i,j;
for (i=1000;i<=9999;i++)
for (j=1;j<=9;j++)
if (i*j==inverse (i))
printf("%5d%2d",i,j);

}
[/code]

I can't understand the double for loop.
Can anyone please help me?
Thanks!!!

Yes. I understand it. Thank you very much.

COURSE (CourseID, Cname, Ccredit) TEACHER (TeacherID, Tname, Toffice) STUDENT (StudentID, Sname, Sclass) TAKE_COURSES (CourseID, TeacherID, StudentID, Score, ClassRoom) Question: List all the name of students whose subjects are all past. The answer is: SELECT Sname FROM STUDENT WHERE NOT EXISTS( SELECT * FROM TAKE_COURSE WHERE TAKE_COURSE.StudentID= STUDENT.StudentID AND Score<60) I can't understand this sentence WHERE TAKE_COURSE.StudentID= STUDENT.StudentID AND Score<60) Can anyone please tell me how to resolve it? Thank you very much.