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トップに関する質問数字を後ろからかけ算する方法

編集履歴

質問編集履歴

2

文法の修正

2021/03/10 04:47

投稿

Gingerale09
Gingerale09

スコア8

test CHANGED
File without changes
test CHANGED
@@ -102,10 +102,52 @@
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  public static void main(String[] args) {
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+ int result = 0;
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+
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  System.out.println("Here is the result: ");
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+ int [] multiplyArray = new int [result];
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+
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+ int [] valuesArray = new int [result];
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+
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+
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+
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+ addValues(valuesArray);
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+
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+
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+
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+ multiplyArray(valuesArray, multiplyArray);
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+
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+ System.out.println(Arrays.toString(multiplyArray));
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+
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+
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+
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+ }
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+
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+ }
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+
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+
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+
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  ```
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+
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+ エラーメッセージ
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+
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+ ```
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+
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+ error: cannot find symbol
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+
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+ int numVals = findVal();
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+
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+ symbol: method findVal()
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+
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+ location: class Multiply
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+
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+ 1 error
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+
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+
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+
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+ ```

1

文法の修正

2021/03/10 04:46

投稿

Gingerale09
Gingerale09

スコア8

test CHANGED
File without changes
test CHANGED
@@ -1,4 +1,6 @@
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1
  ### 前提・実現したいこと
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+
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+ 今、配列とメゾットを勉強しています。
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  ユーザーが入力した数字を逆から掛けていくシステムを作りたいです。
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@@ -26,19 +28,15 @@
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- public static void main(String[] args) {
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+ public static int main() {
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- //1. ask for how many numbers
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+ //1. ask for how many numbers
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- //2.input those numbers into arrays
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- //3. multiply them
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- //4.print them out
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-
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- Scanner input = new Scanner(System.in);
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+ Scanner in = new Scanner(System.in);
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  System.out.println("How many numbers?");
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@@ -46,64 +44,68 @@
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  int[] array = new int[i];
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- fill(array, input);
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-
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-
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-
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- int[] product = pro(array);
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-
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-
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-
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- System.out.println("The number are ");
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-
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- print(product);
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+ return 0;
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-
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-
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-
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- }//end main
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-
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-
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-
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- static void print(int[] numbers) {
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-
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- for (int j = 0; j < numbers.length - 1; j++) {
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-
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- System.out.print(numbers[j] + " ");
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-
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- }
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-
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- }//end print
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-
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-
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-
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- static void fill(int[] numbers, Scanner input) {
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-
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- for (int k = 0; k < numbers.length; k++) {
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-
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- numbers[k] = input.nextInt();
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-
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- }
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-
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-
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-
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- }//end of fill
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-
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-
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-
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- private static int[] pro(int[] array) {
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-
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- int[] product = new int[List.length];
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  }
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- ```
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+ //2.input those numbers into arrays
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+ public static int addValues(int[] arr) {
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+
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+ Scanner in = new Scanner(System.in);
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+
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+ for (int i = 0; i < arr.length; i++) {
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+
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+ System.out.println("enter number " + (i + 1));
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+
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+ arr[i] = in.nextInt();
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+
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+ }
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+
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- ### 試したこと
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+ return 0;
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+
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+ }
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+
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+ //3. multiply them
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+ public static void multiplyArray(int[] nums, int[] multiply) {
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+
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+ int total;
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+
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+ for (int i = 0; i < nums.length; i++) {
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+
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+ total = 1;
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+
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+ for (int j = nums.length; j > i; j--) {
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+
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+ total *= nums[(j - 1)];
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+
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+ }
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+
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- 数字をきくこと以外やり方に自信がないです。
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+ multiply[i] = total;
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+
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+
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+
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+ }
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+
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+ }
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+
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+ //4.print them out
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+
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+
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+
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+ public static void main(String[] args) {
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+
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+
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+
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+ System.out.println("Here is the result: ");
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+
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+
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+
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+ ```