Print out n-layered number-triangle

PrintTriangle.cpp

#include <iostream>
#include <math.h>
using namespace std;

int main()
{
	int n = 15;

	for (int i = 1; i <= n; i++)
	{
		for (int t = 0; t < (n - i); t++)
			cout << "  ";
			 
		for (int j = 1; j < i * 2; j++)
		{
			cout << (2 * i - 1 - abs(j - i)) % 10 << " ";
		}

		cout << endl;
	}
}