https://www.oracle.com/java/technologies/downloads/#java11-windows都别问了 在这里
2022-04-19
while (num !=0){
count++;
num=num/10;
}
System.out.print("它是个"+count+"位的数!");
count++;
num=num/10;
}
System.out.print("它是个"+count+"位的数!");