*/
import java.util.Scanner;
class Demo
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
System.out.print("请输入第一个数:");
int num1 = sc.nextInt();
System.out.print("请输入第二个数:");
int num2 = sc.nextInt();
System.out.print("请输入第三个数:");
int num3 = sc.nextInt();