题解 | #统计输入正数个数#

import java.util.Scanner;

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

    //write code here......
    if (num<=0){
        System.out.println(num);
    }
    else {
        String str = String.valueOf(num);
        char[] chars = str.toCharArray();
        int count = chars.length;
        if(chars[0]=='0'){
            count--;
        }
        System.out.println(count);
    }

}

}