public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if(num>0&&num<999999999){
for(;num!=0;num/=10){
count++;}
System.out.println("它是个"+count+"位的数!");
}
逻辑我们可以这样做
public void jisuan(int[] score) {
Arrays.sort(score);
int[] newArray = new int[3];
int num = score.length - 3;
for (int i = 0; i < 3; i++) {
newArray[i] = score[num];
num++;
}
}
public class HelloWorld{
public static void main(String[] args){
int num = 999;
int count = 0;
if (num ==999){
System.out.println("它是个3位的数！");
}
}
}
