Java小练习 输出一个十行的杨辉三角
作者:互联网
用二维数组输出一个10行的杨辉三角:
1
11
121
1331
14641
.......
通过观察,不难得到对于杨辉三角中,每行的首,末位元素均为1,而中间的元素yangHui[i][j]=yangHui[i-1][j-1]+yangHui[i-1][j]
所以可以先建立一个二维数组,再按照这种规律依次赋值,最后遍历一遍即可
public class yangHuiTriangle { public static void main(String[] args) { //声明并初始化二维数组; int[][] yangHui = new int[10][]; for (int i = 0; i < yangHui.length; i++) { yangHui[i] = new int[i + 1]; } //给二维数组赋值 for (int i = 0; i < yangHui.length; i++) { //先给边上的赋值 yangHui[i][0] = 1; yangHui[i][i] = 1; //再给中间的赋值 for (int j = 1; j < yangHui[i].length - 1; j++) { yangHui[i][j] = yangHui[i - 1][j - 1] + yangHui[i - 1][j]; } } //遍历二维数组 for (int i = 0; i < yangHui.length; i++) { for (int j = 0; j < yangHui[i].length; j++) { System.out.print(yangHui[i][j] + " "); } System.out.println(); } } }
标签:Java,int,++,十行,yangHui,length,数组,杨辉三角,赋值 来源: https://www.cnblogs.com/xianghaoran/p/12229896.html