Question

我是初学者.....我似乎无法解决涉及多种方法的问题....使用扫描仪的方法没有做任何事情

package bucky;

import java.util.Scanner;

public class test {
    public static void main(String args[]){

        input();
        for(int time=1;time<values[2];++time){

            double A=values[1]*Math.pow(1+values[3], time);

        System.out.println("You have: "+A+ " subscribers today");
        }}

        public static double[] input(){
            Scanner s=new Scanner(System.in);
            double[] values=new double[3];



            System.out.println("Enter the Principal value: ");
            values[1]=s.nextDouble();
            System.out.println("Enter the no. of days: ");

            values[2]=s.nextInt();
            System.out.println("Enter the Rate of growth : ");
            values[3]=s.nextDouble();
            return values;
        }
}

Answer 1

必须将

values分配给double[] values = input();吗？喜欢：public static void main(String args[]) { double[] values = input(); for (int time = 1; time < values[2]; ++time) { double A = values[1] * Math.pow(1 + values[3], time); System.out.println("You have: " + A + " subscribers today"); } } public static double[] input() { Scanner s = new Scanner(System.in); double[] values = new double[3]; System.out.println("Enter the Principal value: "); values[0] = s.nextDouble(); System.out.println("Enter the no. of days: "); values[1] = s.nextInt(); System.out.println("Enter the Rate of growth : "); values[2] = s.nextDouble(); return values; }

此外，数组中的索引以0开头...因此值[0]是第一个值，依此类推。

试试这段代码：

 <uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />

Answer 2

尝试double [] values = input（）;在主要方法。

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class test { public static void main(String args[])
{

    double[] values = input();
    for(int time=1;time<values[2];++time){

        double A=values[0]*Math.pow(1+values[2], time);

    System.out.println("You have: "+A+ " subscribers today");
    }}

    public static double[] input()
    {
        Scanner s=new Scanner(System.in);
        double[] values=new double[3];



        System.out.println("Enter the Principal value: ");
        values[0]=s.nextDouble();
        System.out.println("Enter the no. of days: ");

        values[1]=s.nextInt();
        System.out.println("Enter the Rate of growth : ");
        values[2]=s.nextDouble();
        return values;
    }

}

同样，它会抛出一个数组输出错误...用values[1] values[0]和values [2] values[1]和values[3]更改values[2]。

无法解决这个问题：

2 个答案: