嵌套循环代码

源自：4-15 编程练习

public class HelloWorld{

public static void main(String[] args){

int num = 999;

int count = 0;

if(num>=0&&num<=999999999){

while(num!=0)

{

count++;

num /=10;}

System.out.println("它是个"+count+"位的数!");

}

else

{

System.out.println("输入有误！");

}

(*这代码错在哪呢?)

提问者：Yangyan97 2016-02-03 12:08