练习2.1
import java.util.Scanner;
public class test {
public static void main(String[] args) {
Scanner Hy=new Scanner(System.in);
String Hyper;
System.out.println("请输入一个0-1000的整数来求整数各位数的和");
Hyper = Hy.nextLine();
int test = Integer.valueOf(Hyper);
if(test > 0 && test <= 1000) {
int a = test % 2;
int b = test / 10;
int c = test / 100;
System.out.println("总和为:" + (a + b + c));
}
else {
System.out.println("完成!");
}
}
}