registrarinterface.java

国外的数据结构与算法分析用书

package Interfaces;

import dslib.list.LinkedListUos;
import Entities.*;

/**	A registrar's interface is an extension of both the 
	instructor and student interface. */
public class RegistrarInterface extends InstructorInterface implements StudentInt
{
	/**	constructor */
	public RegistrarInterface(){}
	
	
	/**	User input 
		Display the registrar's menu and get their selection */
	public int getCommandID()
	{
		System.out.println("\n 1. Enroll a student in a course");
		System.out.println(" 2. List courses in which a student is registered");
		System.out.println(" 3. Change a student's PAC");
		System.out.println(" 4. Withdraw a student from a course");
		System.out.println(" 5. View a student's grades");
		System.out.println(" 6. List open sections for a course");
		System.out.println(" 7. Show amount that a student owes");
		System.out.println(" 21. View a class list");
		System.out.println(" 22. Check section enrollment");
		System.out.println(" 60. Add course section");
		System.out.println(" 61. Change section limit");
		System.out.println(" 62. Change a student's grade");
		System.out.println(" 63. Record a student's grade");
		System.out.println(" 64. Record a student's payment");
		System.out.println(" 99. Quit");

		return (int)readInput("\n  Enter choice : ");
	}
	

	public SectionDetails getSectionDetails()
	{
		int term = getTerm();
		int limit = getLimit();
		String days = getDay();
		String time = getTime();
		return new SectionDetails(term, time, days, limit);
	}
	
	/**	Prompt the user for an enrollment limit */
	public int getLimit()
	{
		return (int)readInput("\nEnter an enrollment limit : ");
	}
	
	/**	Prompt the user for a course section */
	public CourseSection getCourseSection()
	{
		int num = getSectionNumber();
		return new CourseSection(num, getSectionDetails());
	}
      
	/**	Prompt the user for a student's mark */
	public String getStudentMark()
	{
		return readString("\nEnter the student's mark : ");
	}
      
	/**	Get the amount the student paid */
	public double getPayAmount()
	{
		return readInput("\nEnter the amount paid : ");
	}
      
	/**	Get a term number from the user */
	public int getTerm()
	{
		return (int)readInput("\nEnter the term : ");
	}
      
	/**	Get a time for a class */
	public String getTime()
	{
		return readString("\nEnter the time : ");
	}
      
	/**	Get the day */
	public String getDay()
	{
		return readString("\nEnter the days (MWF or TTH) : ");
	}

	/**	Prompt the user for a personal access code */
	public int getNewPAC()
	{
		return (int)readInput("\nEnter a new personal access code : ");
	}
	     
     
	/**	Show s's student number */
	public void showStudentNumber(int num)
	{
		System.out.print("\nThe current student's number is " + num);
	}

	/**	Show information about fees */
	public void showFees(double amount, double paid)
	{	
		System.out.print("\n\nTotal fees  : " + amount);
		System.out.print("\nTotal paid  : " + paid);
		System.out.print("\n_________________________");
		System.out.println("\nTotal Owing : " + (amount - paid));
	}
	
	/**	Display a list of courses for a student */
	public void showCourseList(LinkedListUos list)
	{
		if (list.isEmpty())
			System.out.println("\nNo Courses");
		else
		{
			System.out.println("\ncurrent courses are : \n");
			showList(list);
		}
	}

	/**	Display a list a open course sections */
	public void showOpenSectionsList(LinkedListUos list)
	{
		if (list.isEmpty())
			System.out.println("\nNo current open sections");
		else
		{
			System.out.println("\nThe current open sections are : ");
			showList(list);
		}
	}

} /* end of RegistrarInterface */