十進制轉二進制

Question

代碼大部分都完成了，但我的代碼打印不正確，它的打印結果是 110 而不是 011。我做的問題需要將“110”反轉為“011”

import java.util.Scanner; 

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

Scanner scan = new Scanner(System.in);


   int num, binaryNum = 0;
   int i = 1, rem;

   num = scan.nextInt();

   while (num != 0)
   {
      rem = num % 2;
      num /= 2;
      binaryNum += rem * i;
      i *= 10;
   }


 System.out.println(binaryNum);
}
}

Answer 1

然后使用如下字符串：

   int num = scan.nextInt();

   String s = "";
   while (num != 0) {
    int   rem = num % 2;
      num /= 2;
      s = s + rem; // this concatenates the digit to the string in reverse order.

      // if you want it in normal order, do it ->  s = rem + s;
   }
   System.out.println(s);

Answer 2

您可以簡單地使用 Integer#toBinaryString(int) 將結果作為二進制字符串返回。

        Scanner scan = new Scanner(System.in);

        int value = scan.nextInt();

        System.out.println(Integer.toBinaryString(value));

Answer 3

您可以直接打印每個二進制數字，而無需將其存儲在binaryNum

while (num != 0) {
    System.out.print(num % 2);
    num /= 2;
}

System.out.println();