C++ 程序打印空心倒直角三角形星形图案

编写一个 C++ 程序，使用 for 循环打印空心倒直角三角形星形图案。

#include<iostream>
using namespace std;

int main()
{
	int i, j, rows;
     
    cout << "Enter Hollow Inverted Right Triangle Star pattern Rows = ";
    cin >> rows;

    cout << "Hollow Inverted Right Angled Triangle Star Pattern\n"; 

    for(i = rows; i > 0; i--)
    {
    	for(j = 1; j <= i; j++)
		{
            if(j == 1 || j == i || i == 1 || i == rows) 
            {
                cout << "*";
            }
            else
            {
                cout << " ";
            }         
        }
        cout << "\n";
    }		
 	return 0;
}

此 C++ 图案示例 使用 while 循环打印给定字符的空心倒直角三角形。

#include<iostream>
using namespace std;

int main()
{
	int i, j, rows;
    char ch;
     
    cout << "Enter Rows = ";
    cin >> rows;

    cout << "Enter Symbol = ";
    cin >> ch;
    
    i = rows;
    while( i > 0)
    {
        j = 1;
    	while( j <= i)
		{
            if(j == 1 || j == i || i == 1 || i == rows) 
            {
                cout << ch;
            }
            else
            {
                cout << " ";
            }   
            j++;      
        }
        cout << "\n";
        i--;
    }		
 	return 0;
}

Enter Rows = 15
Enter Symbol = $

$$$$$$$$$$$$$$$
$            $
$           $
$          $
$         $
$        $
$       $
$      $
$     $
$    $
$   $
$  $
$ $
$$
$