Question

尝试使用for和while循环打印出2个三角形，用户输入n 但是while循环我无法打印出三角形它应该是这样的：

n = 3
*X
*X X
*X X X
*X
*X X
*X X X

但它打印出来像这样

X
X X
X X X
X
X
X
X
X
X

import java.util.*;
public class Triangle
{
public static void main(String[] args)
{
    Scanner input = new Scanner(System.in);
    int n, number, count=0, count1;

    System.out.print("Please enter an integer number: ");
    n = input.nextInt();

    if (n>0)
    {
       for(int i = 1; i<=n; i++)
       {    
           for(int j=0; j<i;j++)
           System.out.print(" X");


           System.out.println("");


       }

       while(count<n)
       {   
           count = count +1;
           count1 = 0;
           while(count1 < count)
           {

               System.out.print(" X");
               System.out.println("");

               count1 = count1 + 1;
            }
       }


    }
    else
    {
    System.out.print("Invalid number! Enter the number again!");
    }

   }
   }

Answer 1

看看你的while循环。你内在的while循环中有System.out.println("");。与带有for循环的版本一样，System.out.println("");应在内部while循环处理后调用。

while(count<n) //outer
{   
    count = count +1;
    count1 = 0;
    while(count1 < count) //inner
    {
        System.out.print(" X");
        count1 = count1 + 1;
    }
    System.out.println(""); // Thats the right place. 
}

使用for循环和while循环创建2个三角形

1 个答案: