题解 | #十进制数转二进制数#

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int num = scanner.nextInt();

        //write your code here......
        int n = num;
        String output = "";
        String ans = "";
        while(n > 0){
            if(n % 2 == 0) output += "0";
            else output += "1";
            n /= 2;
        }
        for(int i = output.length() - 1; i >= 0; i--){
            ans += String.valueOf(output.charAt(i));
        }
        if(num == 0) System.out.println(0);
        else System.out.println(ans);
    }
}