加法表

package com.day03;
import java.util.*;
public class Demo6 {
    static Scanner sr = new Scanner(System.in);
 public static void main(String[] args){
 int a,b;
 System.out.println("请输入一个数");
 int num = sr.nextInt();
 System.out.println(num + "这个数字的加法表如下：");
 for(a =0,b = num;a <= num;a++,b--){
 System.out.println(a + "+" +b+"="+(a+b));
 }
 }
}