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  1. import java.util.Scanner;
  2.  
  3. public class Main {
  4.     public static void main(String[] args) {
  5.         String[] msg0 = {"数字を入力してください ",
  6.         "入力された数字の%s結果は%dです。\n"};
  7.         String[] msg1 = {"足し算", "引き算", "掛け算", "割り算"};
  8.         int var;
  9.         Scanner scan = new Scanner(System.in);
  10.         for (int i = 0; i < msg1.length; i++) {
  11.             System.out.print(msg0[0]);
  12.             Foo foo = new Foo(scan.nextInt());
  13.             System.out.print(msg0[0]);
  14.             var = scan.nextInt();
  15.             System.out.printf(msg0[1], msg1[i], i == 0 ? foo.add(var): (i == 1 ? foo.sub(var): (i == 2 ? foo.mul(var): foo.div(var))));
  16.         }
  17.  
  18.     }
  19. }
  20.  
  21. class Foo {
  22.     static int x;
  23.  
  24.     public Foo(int y) {
  25.         x = y;
  26.     }
  27.     public static int add(int y) {
  28.         return x + y;
  29.     }
  30.     public static int sub(int y) {
  31.         return x - y;
  32.     }
  33.     public static int mul(int y) {
  34.         return x * y;
  35.     }
  36.     public static int div(int y) {
  37.         return x / y;
  38.     }
  39. }
  40.  
Runtime error #stdin #stdout #stderr 0.14s 52784KB
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stdin
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Standard input is empty
stdout
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数字を入力してください
stderr
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Exception in thread "main" java.util.NoSuchElementException
	at java.base/java.util.Scanner.throwFor(Scanner.java:937)
	at java.base/java.util.Scanner.next(Scanner.java:1594)
	at java.base/java.util.Scanner.nextInt(Scanner.java:2258)
	at java.base/java.util.Scanner.nextInt(Scanner.java:2212)
	at Main.main(Main.java:12)
https://ideone.com/NXlm41
language:
Java (12.0.1)
created:
1 year ago
visibility:
public

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