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package com.Exam.java;

import java.util.Scanner;

public class ExamDemo2 {

public static void main(String[] args) {

Scanner inScanner = new Scanner(System.in);

System.out.print("请输入行数：");

int rank = inScanner.nextInt();

if(rank<=1){

System.out.println("请输入大于1的行数");

return;

}

System.out.print("请输入列数：");

int line = inScanner.nextInt();

if((line%2)==0){

System.out.println("列数请输入奇数！");

//return;

}

// 打印空心倒置等腰三角形

//打印第一行

for (int b = 0; b <= line - 1; b = b + 2) {

System.out.print("*");

System.out.print(" ");

}

System.out.println();

for (int i = 1; i < rank; i++) {

int xing =line - (i * (line - 1) / (rank - 1));

// 首先打印空格

for (int j = 0; j <= ((line - xing) / 2) - 1; j++) {

System.out.print(" ");

}

// 接下来打印星号

System.out.print("*");

for (int a = xing; a > 2; a--) {

System.out.print(" ");

}

if (i != rank-1)

System.out.print("*");

// 最后记得在一行输入完毕后需要换行

System.out.println();

}

// 如果打印星号每行之间差值为奇数，或行数大于列数，或列数为偶数，打印三角形效果不为等腰三角形

/*

* if((((line-1)/(rank-1)%2)!=0)||(rank>line)||(line%2)==0){

* System.out.println("显示问题导致无法正常显示为等腰三角形，请重试！");

*/

}

}