杨辉三角

import java.util.Scanner;

public class YangHui {

public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请输入一个数：");
int s = input.nextInt();
int a[][] = new int[s][s];

for (int i = 0; i < s; i++) {
/*for (int k = 1; k < s - i; k++) {
System.out.print(" ");
}*/
for (int j = 0; j <= i; j++) {
if (i == 0 || i == j || j == 0) {
a[i][j] = 1;
} else {
a[i][j] = a[i - 1][j - 1] + a[i - 1][j];
}
System.out.print(a[i][j] + "  ");
}
System.out.println();
}

}

}