java语言程序设计 第十版（基础篇）6.1

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input = new Scanner(System.in);
		System.out.print("You want to display :");
		int n = input.nextInt();
		int counter = 0;
		getPentagonalNumber(n,counter);
		
	}
	
	public static int getPentagonalNumber(int n ,int counter) {
		int pentagonalNumber = 0;
		for(int i =1;i<=n;i++) {
			
			pentagonalNumber = i*(3*i-1)/2;
			counter++;
			PrintNumber(pentagonalNumber,counter);
		}
		return pentagonalNumber;
	}

	public static void PrintNumber(int n ,int counter) {
		
		if(counter%10 ==0)
			System.out.println(n);
		else
			System.out.print(n+"\t");
		
	}