C++ Program to Print Pascal Triangle

Write a C++ Program to Print Pascal Triangle with an example. In this Pascal triangle example, long factorialNum(int number) finds the factorial of a number. Within the nested for loop, we used this method to get our pattern.

#include<iostream>
using namespace std;

long factorialNum(int number)
{
	long factorial = 1;
	
	for (int i = 1; i <= number; i++)
	{
		factorial = factorial * i;
	}
	return factorial;
}

int main()
{
	int i, j, number;
	
	cout << "\nPlease Enter the Number  =  ";
	cin >> number;	
	cout << "\n----------\n ";
	for (i = 0; i < number; i++)
	{
		for (j = 0; j <= (number - i - 2); j++)
		{
			cout << " ";
		}
		for (j = 0; j <= i; j++)
		{
			cout << factorialNum(i) / (factorialNum(j) * factorialNum(i - j)) << " ";
		} 
		cout << "\n";
	}
 	return 0;
}
Please Enter the Number  =  7

----------
       1 
     1 1 
    1 2 1 
   1 3 3 1 
  1 4 6 4 1 
 1 5 10 10 5 1 
1 6 15 20 15 6 1 

C++ Program to Print Pascal Triangle using Recursion

We are using the Recursion concept to Print the Pascal Triangle. Please refer to the C++ program.

#include<iostream>
using namespace std;

long factorialNum(int number)
{
	if(number == 0 || number == 1)
	{
		return 1;
	}
	else
	{
		return number * factorialNum(number - 1);
	}
}

int main()
{
	int i, j, number;
	
	cout << "\nPlease Enter the Number for Pascal Triangle  =  ";
	cin >> number;	
	cout << "\n-----Pascal Triangle-----\n ";
	for (i = 0; i < number; i++)
	{
		for (j = 0; j <= (number - i - 2); j++)
		{
			cout << " ";
		}
		for (j = 0; j <= i; j++)
		{
			cout << factorialNum(i) / (factorialNum(j) * factorialNum(i - j)) << " ";
		} 
		cout << "\n";
	}
 	return 0;
}
C++ Program to Print Pascal Triangle using recursion

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.