/**
* @author HulinSciece
* 5.17
* 提示用户输入1 to 15 之间的数，打印输出金字塔图案。 1
* 2 1 2
* 3 2 1 2 3
* 分析：1.先写出左半边图案。 2.输出个数等于行数 number = lines 3.输出顺序是从大到小 4.空格数输出spaceNumber = (lines - 1)
* 2 * space
* 2.用格式化输出空格和数字 system.out.printf("%4s","") and System.out.printf("%4d",i)
* 3.写成方法方便其他程序调用
* the programe test passing
*
* data:2019/01/02
*
*/
package com.Five.exercise;
import java.util.Scanner;
public class OutputPyramid {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
//create a scanner
Scanner input = new Scanner(System.in);
System.out.println("Please enter the lines:");
int numberOfLines = input.nextInt();
System.out.println("The pyramid is :");
OutputPyramid(numberOfLines);
}
private static void OutputPyramid(int numberOfLines) {
// TODO Auto-generated method stub
for (int line = 1; line <= numberOfLines; line++) {
//putout row number
int spaceNumber = 0;
// spaceNumber = (numberOfLines - line);
// String space = " ";
// System.out.printf("%" + spaceNumber + "s",space);
//putout space
//the numberOfLines > 9
for (int i = numberOfLines-line; i > 0; i--) {
System.out.printf("%4s","");
}
//putout the left number in the same line
for (int leftNumber = line; leftNumber > 0 ; leftNumber--) {
//using With formatted output, the number of changes automatically leave space
// not
System.out.printf("%4d",leftNumber);
}
//putout the right number in the same
for (int rightNumber = 2; rightNumber <= line; rightNumber++) {
System.out.printf("%4d",rightNumber);
}
System.out.println();
}
}
}