哪位大神帮帮忙，求求了

哪位大神帮帮忙，求求了

你好，请描述详细问题

要求成员变量是三条边

public class Sanjiaoxing{

    private double a;

    private double b;

    private double c;

    public Sanjiaoxing(double a,double b,double c){

        this.a = a;

        this.b = b;

        this.c = c;

    }

    public double zhouchang(){ 

        return a+b+c;
    }

}

public class test{

    public static void main(String[] args) throws Exception {

        Sanjiaoxing sj = new Sanjiaoxing(23,5,8);

        System.out.println("周长 = " + sj.zhouchang());

    }

}