averagescore.java

计算平均分

import java.applet.*;
import java.awt.*;
public class averagescore extends Applet
{
	Label prompt;
	TextField input;
	int score;
	int xf;
	int number;
	int average;
	int totalnumber;
	int y;
	int x;
	int n;
	
	public void init()
	{
		prompt= new Label("请输入你的成绩（输入-1查看你的GPA成绩）：");
		input=new TextField(4);
		add(prompt);
		add(input);
	}
	
	public void paint(Graphics g)
	{
		if(number==-1)
		{
			g.drawString("你的GPA成绩为："+average,100,100);
		
		
		}
		else
		{
		g.drawString("你输入了：" + totalnumber+" 门成绩。" ,100,80);
		g.drawString("你现在输入的成绩为：" +number,100,100);
		g.drawString("你次门课程的学分为：" +score,100,120);
		}
	}
	
	public boolean action(Event e,Object o)
	{
		
       
		
		if(e.target==input)
		{
			
			number=Integer.parseInt(input.getText());
			
			if(number==-1)
			{
				score=0;
				xf=0;
			    
				totalnumber=0;
			    average=x/y;
			}
			else if(85<=number&number<=100)
			{
				score=4;
				totalnumber++;
				 n=number*score;
				y+=score;
				x+=n;
		
			}
			
			else if(75<=number&number<=84)
			{
				score=3;
				totalnumber++;
				 n=number*score;
			    y+=score;
				x+=n;
	
			}
			
			else if(60<=number&number<=74)
			{
				score=2;
				totalnumber++;
				 n=number*score;
				y+=score;
				x+=n;
		
			}
			
			else if(45<=number&number<=59)
			{
				score=1;
				totalnumber++;
				 n=number*score;
			    y+=score;
				x+=n;
			}
			
			else if(number<=44)
			{
				score=0;
				totalnumber++;
				 n=number*score;
	            y+=score;
				x+=n;
			}
			
			
			input.setText("");
			repaint();
		}
		
		return true;
		
	}
}