//从键盘上输入一个正整数n,请按照以下五行杨辉三角形的显示方式, //输出杨辉三角形的前n行。请采用循环控制语句来实现。 //(三角形腰上的数为1,其他位置的数为其上一行相邻两个数之和。) //1 //1 1 //1 2 1 //1 3 3 1 //1 4 6 4 1 //1 5 10 10 5 1 package 数组; import java.util.Scanner; public class 杨辉三角 { public static void main(String[] args) { int i ; int j ; int n ; Scanner sc = new Scanner ( System.in ) ; System.out.println( "请输入行数n: " ) ; n = sc.nextInt() ; int [ ] [ ] array = new int [ n ] [ n ] ; for ( i = 0 ; i < n ; i++ ) { for ( j = 0 ; j <= i ; j++ ) { if ( j == 0 || j == n ) { array [ i ] [ j ] = 1 ; } else { array [ i ] [ j ] = array [ i - 1 ] [ j - 1 ] + array [ i - 1 ] [ j ] ; } System.out.print( array [ i ] [ j ] + " " ) ; } System.out.println( ) ; } } }