courserecal.java

学生信息读系统（根据学生的学号从存储系统读取学生信息）： 姓名

//Calculate the result of each course.
//Here we think all the scores are int value.
public class CourseReCal
{
	//calculate method.
	//Course result is determined by usual result 
	//and exam result.
	//exam:70%,usual:30%.
	public static final int SEVEN_TO_THREE=0;
	
	//exam:60%,usual:40%.
	public static final int SIX_TO_FOUR=1;
	
	//exam:50%,usual:50%.
	public static final int FIVE_TO_FIVE=2;
	
	//Get the usual result from the int array.
	//@param scores Each element of this arry is a schoolwork score.
	public static int getUsualRe(int[] scores)
	{
		if(scores==null)
		{
			return 0;
		}
		else
		{
		    int num=scores.length;
		    int results=0;
		    for(int i=0;i<num;i++)
		    {
			    results+=scores[i];
		    }
		    return (int)(results/num);
		}
	}
	
	//Get the course total result.
	//@param scores the array stores schoolword-scores.
	//@param examRe the exam score.
	//@param calMe the calculate method.One of the three above.
	public static int getCourseRe(int examRe,int[] scores,int calMe)
	{
		int usualRe=getUsualRe(scores);
		return getCourseRe(examRe,usualRe,calMe);
	}
	
	public static int getCourseRe(int examRe,int usualRe,int calMe)
	{
		if(usualRe==0)
		{
			return examRe;
		}
		if(calMe==SEVEN_TO_THREE)
		{
			return (int)(examRe*0.7f+usualRe*0.3f);
		}
		if(calMe==SIX_TO_FOUR)
		{
			return (int)(examRe*0.6f+usualRe*0.4f);
		}
		if(calMe==FIVE_TO_FIVE)
		{
			return (int)(examRe*0.5f+usualRe*0.5f);
		}
		else
		return -1;
	}
}