九九乘法表-倒序

大家好：

昨天在百度答题的时候，遇到这问题，自己写了程序，记录一下：

package com.gc.action.baiduTest;

public class JiujiuChengfaBiao {

	public static void main(String[] args) {
		jiujiu(9,9);//9与1-9相乘倒序
		System.out.println();
		System.out.println("-------------");
		yidaojiu(9);//九九乘法表倒叙
	}
	//9与1-9相乘倒序
	public static void jiujiu(int frist,int secend){
		for(int i= secend; secend>=1; secend--){
			for(int j=frist;frist>=1;frist--){
				int sum=frist*secend;
				System.out.print(frist+" * "+secend+" = "+ sum+"  ");
			}
		}
	}
	//九九乘法表倒叙
	public static void yidaojiu(int frist){
		for(int i = frist; frist>=1; frist--){
			for(int j=frist;j>=1;j--){
				int sum = j*frist;
				System.out.print(frist+" * "+ j +" = "+sum+"  ");
			}
			System.out.println();
		}
	}
}

结果为：

9 * 9 = 81  8 * 9 = 72  7 * 9 = 63  6 * 9 = 54  5 * 9 = 45  4 * 9 = 36  3 * 9 = 27  2 * 9 = 18  1 * 9 = 9  
-------------
9 * 9 = 81  9 * 8 = 72  9 * 7 = 63  9 * 6 = 54  9 * 5 = 45  9 * 4 = 36  9 * 3 = 27  9 * 2 = 18  9 * 1 = 9  
8 * 8 = 64  8 * 7 = 56  8 * 6 = 48  8 * 5 = 40  8 * 4 = 32  8 * 3 = 24  8 * 2 = 16  8 * 1 = 8  
7 * 7 = 49  7 * 6 = 42  7 * 5 = 35  7 * 4 = 28  7 * 3 = 21  7 * 2 = 14  7 * 1 = 7  
6 * 6 = 36  6 * 5 = 30  6 * 4 = 24  6 * 3 = 18  6 * 2 = 12  6 * 1 = 6  
5 * 5 = 25  5 * 4 = 20  5 * 3 = 15  5 * 2 = 10  5 * 1 = 5  
4 * 4 = 16  4 * 3 = 12  4 * 2 = 8  4 * 1 = 4  
3 * 3 = 9  3 * 2 = 6  3 * 1 = 3  
2 * 2 = 4  2 * 1 = 2  
1 * 1 = 1