个回答

• gang_haha

  2016-12-05 16:28:17

  已采纳

  
  

  public static void main(String[] args){

      int num=123;

      int i;

      int num1=0;

  if(num<=0){

      System.out.println("请输入正数！");

  }else if(num<10){

      System.out.println("结果： "+num);

  }else{

      while(num>0){

          //取当前num值的个位数。

          i = num % 10;

          //取num去掉个位数后的数字，如123变成12.

          num = num / 10;

          num1 = num1 * 10 + i;

      }

      System.out.println("结果： "+num1);

  }

  }

  1

• 期待190

  2016-12-15 16:17:22

  public class SimpleDemo {

  public static void main(String[] args){

  Scanner input=new Scanner(System.in);

  System.out.print("请输入一个正整数：");

  int abc=input.nextInt();

  System.out.println("您输入的正整数是："+abc);

     if (abc>0) {

  StringBuilder sBuilder=new StringBuilder(String.valueOf(abc));

  System.out.println("结果："+sBuilder.reverse());

  }

  }

  
  

  }

  
  

  1

• 小小_a

  2016-12-05 16:43:42

  int  a=123;

  int  b;

  int c=2;

  int  sum=0;

  int i=0;

  while(i<3){

  b=a/10;

  a=a-10^c;

  sum=sum+b*(10^i);

  i++;

  c--;

  }

  System.out.println(sum);

  }

  
  

  1

• qq_失心瘋包黑炭_03220852

  2016-12-05 16:34:23

  import java.util.Scanner;

  public class Test{

  public static void main(String []args) {

  Scanner in=new Scanner(System.in);

  System.out.print("输入字符串:");

  String s=in.nextLine();

  System.out.println("字符串的逆序为:"+'\n'+reverse(s));

  in.close();

  }

  public static String reverse(String s){

  char[] chars=s.toCharArray();

  int i;

  s="";

  for(i=chars.length-1;i>=0;i--)

  s+=chars[i];

  return s;

  }

  }

  
  

  0

• 慕粉2026009740

  2016-12-05 16:27:08

  int a=123;

  while(a>0){

  int b=a%10;

  System.out.println(b);

  a=a/10;

  }

  
  

  2