C++ 打印空心矩形星形图案程序

编写一个C++程序，使用for循环打印空心矩形星形图案。

#include<iostream>
using namespace std;

int main()
{
	int i, j, rows, columns;
     
    cout << "Enter Hollow Rectangle Rows = ";
    cin >> rows;

    cout << "Enter Hollow Rectangle Columns = ";
    cin >> columns;

    cout << "Hollow Rectangle Star Pattern\n"; 

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

这个C++示例使用while循环打印给定字符的空心矩形图案。

#include<iostream>
using namespace std;

int main()
{
	int i = 0, j, rows, columns;
    char ch;
     
    cout << "Enter Hollow Rectangle Rows and Columns = ";
    cin >> rows >> columns;

    cout << "Enter Symbol for Hollow Rectangle = ";
    cin >> ch;

    cout << "Hollow Rectangle Star Pattern\n"; 

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

Enter Hollow Rectangle Rows and Columns = 14 25
Enter Symbol for Hollow Rectangle = #
Hollow Rectangle Star Pattern
#########################
#                       #
#                       #
#                       #
#                       #
#                       #
#                       #
#                       #
#                       #
#                       #
#                       #
#                       #
#                       #
#########################