哪位大神回答一下,这是什么问题?底下是我的源代码
1 2 3 4 5 6 7 8 9 10 11 | 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( "这是个" +count+ "位数" ); } }} |