[JAVA]输入三门课程成绩,并计算平均数; 用函数判断:如果平均数>=60,返回合格,否则返回不合格

 

/*输入三门课程成绩,并计算平均数;
用函数判断:如果平均数>=60,合格,否则不合格;

*/
import java.util.Scanner;
public class ReturnString
{
    public static void main(String[] args)
    {
        Scanner userInput = new Scanner(System.in);
        double math, english, science;
        System.out.println("input three scores(math, english, science respectively), using space to separate each score: ");
        math = userInput.nextDouble();
        english = userInput.nextDouble();
        science = userInput.nextDouble();
        double average = (math + english + science) / 3;
        System.out.println("average score is " + Math.ceil(average));
        System.out.println("status: " + decide(average));
    }
    static String decide(double average)
    {
        String result; //保证return值是单一出口
        if (average < 60)
            result = "fail";
        else
            result = "pass";
        return result;
    }
}

 

 

注意:java中,函数可以返回String类