public class HelloWorld{ public static void main(String[] args){ int num = 999; int count = 0; while(num!=0){ num = num/10; count++; } System.out.println("它是个"+count+"位的数!"); } }
这里好像连感叹号都验证,把感叹号修改成中文的吧
System.out.println("它是个"+count+"位的数!");