(金融：比较成本）假设你要通过两种不同的包裹运输大米。你将

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("请输入第一包大米的重量和价格：");
        double weight1 = sc.nextDouble();
        double price1 =sc.nextDouble();
        System.out.print("请输入第二包大米的重量和价格：");
        double weight2 =sc.nextDouble();
        double price2 =sc.nextDouble();
        sc.close();
        double isprice = price1/weight1 - price2/weight2 ;
        if (isprice == 0){
            System.out.println("两包大米价格一样");
        }else if(isprice >0 ){
            System.out.println("第二包大米价格更实惠");
        }else{
            System.out.println("第一包大米价格更实惠");
        }
    }

System.out.println("请分别输入包裹一和包裹二的重量以及价格");
        Scanner scanner=new Scanner(System.in);
        double weight1=scanner.nextDouble();
        double price1=scanner.nextDouble();
        double weight2=scanner.nextDouble();
        double price2=scanner.nextDouble();
        if(weight1/price1>weight2/price2) {
            System.out.println("包裹二有着更好的价格");
        }else if (weight1/price1==weight2/price2) {
            System.out.println("两个包裹有着同样的价格");
        }else {
            System.out.println("包裹一有着更好的价格");
        }