yanghuisanjiao.java

java课后题的详细答案

public class YangHuiSanJiao {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int i = 0;
		int j = 0 ;
		double[][] arry = new double[1000][1000];
		int length = arry.length;
		yangHui(arry,length);
		for(i = 0 ; i < length ;i++){
			for(j = 0 ; j <= i ;j++)
				System.out.print(" "+(int)arry[i][j]);
			System.out.print("\n");
			
		}
		
	}
	public static void yangHui(double[][] arry,int n){
		int i = 0;
		int j = 0 ;
			n = arry.length;
		for(i = 0 ;i < n ; i++){
			arry[i][0] = 1;
			arry[i][i] = 1 ;
		}
		for(i = 2 ; i < n ; i++){
			for(j = 1 ; j <= i ; j++){
				arry[i][j] = arry[i-1][j-1]+arry[i-1][j]; 
			}	
		}
	}
}