package exp4;

class Postgraduate extends Student {  
    public Postgraduate(String name)
    {
       super(name,"研究生");	 
    }   
    public void calculateGrade()
    {
        int total = 0;
        double average = 0;
        for (int i = 0; i < CourseNo; i++) {
            total =total + getCourseScore(i);
        };
        average = total / CourseNo;
        String currentGrade="";
        if (average>=90){ 
            currentGrade = "优秀";
        }
        else if (average>=80&&average<90) {
            currentGrade = "良好";
        }
        else if (average>=70&&average<80) {
            currentGrade = "一般";
        }
        else if (average>=60&&average<70) {
            currentGrade = "及格";
        }
        else{
            currentGrade = "不及格";
        }	
        setCourseGrade(currentGrade);
     }
 }