package com.demo.day;
/*
java 允許將同一個類中多個同名同功能 但 參數個數不同的方法，封裝成一個方法，就可以通過可變參數實現
 */
public class Varparameter {
    public static void main(String[] args) {
        HspMethod m = new HspMethod();
        System.out.println(m.sum(1,4,3,2,4,53,34));
    }
}
class HspMethod{
    public int sum(int n1,int n2){
        return n1 + n2;
    }
    public int sum(int n1,int n2,int n3){
        return n1 + n2 + n3;
    }
    public int sum(int n1,int n2,int n3,int n4){
        return n1 + n2 + n3 + n4;
    }
    //int... 表示接受的是可變參數，類型是int，即可以接收多個int（0~n）
    //使用可變參數時，可以當作數組來使用，即nums可以當作數組
    //遍歷 nums 求和即可
    public int sum(int... nums){
//        System.out.println("接收的參數個數=" + nums.length);
        int res = 0;
        for (int i = 0;i < nums.length;i++){
            res += nums[i];
        }
        return res;
    }
    //可變參數可以和普通類型的參數一起放在形參列表，但必須保證可變參數是在最后
    //一個形參列表中只能有一個可變參數
    public void f2(String str,double... nums){

    }
}

package com.demo.day;

import java.util.Scanner;

public class VarParameterExercise {
    public static void main(String[] args) {
        YshMethod ysh = new YshMethod();
        Scanner sc = new Scanner(System.in);
        System.out.println(ysh.showScore("游書恒",78.5,99,56,56,45,34,65,34,88));
    }
}
class YshMethod {
    public String showScore(String name,double score1,double score2){
        double res = score1 + score2;
        return "姓名：" + name + "\n兩門總分:" + res;
    }
    public String showScore(String name,double score1,double score2,double score3){
        double res = score1 + score2 + score3;
        return "姓名：" + name + "\n三門總分:" + res;
    }
    public String showScore(String name,double score1,double score2,double score3,double score4,double score5){
        double res = score1 + score2 + score3 + score4 + score5;
        return "姓名：" + name + "\n五門總分:" + res;
    }

    public String showScore(String name,double... scores){
        double res = 0;
        int num = 0;
        for (int i = 0;i<scores.length;i++){
            res += scores[i];
            num++;
        }
        return "姓名：" + name + "\n" + num + "門總分：" + res;
    }
}