在eclipse里打正确,网页里提示错误
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if(0<=num&&num<=999999999){
while(num!=0){
count++;
num/=10;
}
System.out.println("它是个"+count+"位的数!");
}
else{
System.out.println("错误");
}
}
}
