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