public static int reverse(int number)
For example, reverse(3456) displays 6543. Write a test program that promotes the user to enter an integer and displays its reversal.
- import java.util.Scanner;
- public class C1
- {
- public static void main(String[] args)
- {
- Scanner input = new Scanner(System.in);
- System.out.println("請輸入整數:");
- int number = input.nextInt();
- System.out.println(reverse(number));
- }
- public static int reverse(int number)
- {
- int[] array = new int[10];
- int i = 0;
- int z = number;
- int count = 1;
- int t = 1;
- int result = 0;
- while(number > 0)
- {
- int a = number % 10;
- array[i] = a;
- z = number / 10 ;
- number = z;
- i++ ;
- count = count + 1;
- }
- for(int a = count - 2 ; a >= 0 ; a--)
- {
- int c = array[a] * t ;
- result = result + c;
- t = t * 10;
- }
- return result;
- }
- }
更好的:
回覆刪除package javaapplication24.簡單;
import java.util.Scanner;
public class JavaApplication24簡單 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("請輸入數字");
int no = sc.nextInt();
int sum = 0;
while(no != 0) {
int a = no % 10;
sum = sum * 10 + a;
no /= 10;
}
System.out.println(sum);
}
}