C++ Program to Print Hollow Right Pascals Star Triangle

Write a C++ program to print the hollow right pascals star triangle pattern using for loop. 

#include<iostream>
using namespace std;

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

    cout << "Hollow Right Pascals Star Triangle Pattern\n"; 

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

    for (i = 1; i <= rows - 1; i++ ) 
    {
		for (j = rows - 1; j >= i; j--) 
		{
			if(j == rows - 1 || j == i || i == rows) 
            {
                cout << "*";
			}
			else {
				cout << " ";
			}
		}
		for(k = 1; k < i; k++)
		{
			cout << " ";
		}
        cout << "\n";
    }	
 	return 0;
}
C++ Program to Print Hollow Right Pascals Star Triangle

This C++ example prints the hollow right pascals triangle pattern of a given character using a while loop.

#include<iostream>
using namespace std;

int main()
{
	int i = 1, j, k, rows;
    char ch;
     
    cout << "Enter Hollow Right Pascals Star Triangle Rows = ";
    cin >> rows;

    cout << "Enter Symbol for Hollow Right Pascals Triangle = ";
    cin >> ch;

    cout << "Hollow Right Pascals Star Triangle Pattern\n"; 

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

    i = 1; 
    while (i <= rows - 1 ) 
    {
        j = rows - 1; 
		while (j >= i) 
		{
			if(j == rows - 1 || j == i || i == rows) 
            {
                cout << ch;
			}
			else {
				cout << " ";
			}
            j--;
		}
        k = 1;
		while( k < i)
		{
			cout << " ";
            k++;
		}
        cout << "\n";
        i++;
    }	
 	return 0;
}
Enter Hollow Right Pascals Star Triangle Rows = 10
Enter Symbol for Hollow Right Pascals Triangle = &
Hollow Right Pascals Star Triangle Pattern
&
&&
& &
&  &
&   &
&    &
&     &
&      &
&       &
&        &
&       &
&      & 
&     &  
&    &   
&   &    
&  &     
& &      
&&       
&  

About Suresh

Suresh is the founder of TutorialGateway and a freelance software developer. He specialized in Designing and Developing Windows and Web applications. The experience he gained in Programming and BI integration, and reporting tools translates into this blog. You can find him on Facebook or Twitter.