C++ Program to Print Sandglass Alphabets Pattern

Write a C++ program to print sandglass alphabets pattern using for loop.

#include<iostream>
using namespace std;

int main()
{
	int rows, i, j, k, alphabet;

	cout << "Enter Sandglass Pattern of Alphabets Rows = ";
	cin >> rows;

	cout << "Printing Sandglass Alphabets Pattern\n";
	alphabet = 64;

	for (i = 1; i <= rows; i++)
	{
		for (j = 1; j < i; j++)
		{
			cout << " ";
		}
		for (k = i; k <= rows; k++)
		{
			cout << char(alphabet + k) << " ";
		}
		cout << "\n";
	}

	for (i = rows - 1; i >= 1; i--)
	{
		for (j = 1; j < i; j++)
		{
			cout << " ";
		}
		for (k = i; k <= rows; k++)
		{
			cout << char(alphabet + k) << " ";
		}
		cout << "\n";
	}
}

C++ program to print the sandglass alphabets pattern using a while loop.

#include<iostream>
using namespace std;

int main()
{
	int rows, i, j, k, alphabet;

	cout << "Enter Sandglass Pattern of Alphabets Rows = ";
	cin >> rows;

	cout << "Printing Sandglass Alphabets Pattern\n";
	alphabet = 64;
	i = 1;

	while (i <= rows)
	{
		j = 1;
		while (j < i)
		{
			cout << " ";
			j++;
		}

		k = i;
		while (k <= rows)
		{
			cout << char(alphabet + k) << " ";
			k++;
		}
		cout << "\n";
		i++;
	}

	i = rows - 1;
	while (i >= 1)
	{
		j = 1;
		while (j < i)
		{
			cout << " ";
			j++;
		}

		k = i;
		while (k <= rows)
		{
			cout << char(alphabet + k) << " ";
			k++;
		}
		cout << "\n";
		i--;
	}
}

Enter Sandglass Pattern of Alphabets Rows = 12
Printing Sandglass Alphabets Pattern
A B C D E F G H I J K L 
 B C D E F G H I J K L 
  C D E F G H I J K L 
   D E F G H I J K L 
    E F G H I J K L 
     F G H I J K L 
      G H I J K L 
       H I J K L 
        I J K L 
         J K L 
          K L 
           L 
          K L 
         J K L 
        I J K L 
       H I J K L 
      G H I J K L 
     F G H I J K L 
    E F G H I J K L 
   D E F G H I J K L 
  C D E F G H I J K L 
 B C D E F G H I J K L 
A B C D E F G H I J K L 

This C++ program displays the sandglass pattern of alphabets using the do while loop.

#include<iostream>
using namespace std;

int main()
{
	int rows, i, j, k, alphabet;

	cout << "Enter Sandglass Pattern of Alphabets Rows = ";
	cin >> rows;

	cout << "Printing Sandglass Alphabets Pattern\n";
	alphabet = 64;
	i = 1;

	do
	{
		j = 1;
		do
		{
			cout << " ";

		} while (j++ < i);

		k = i;
		do
		{
			cout << char(alphabet + k) << " ";

		} while (++k <= rows);
		cout << "\n";

	} while (++i <= rows);

	i = rows - 1;
	do
	{
		j = 1;
		do
		{
			cout << " ";

		} while (j++ < i);

		k = i;
		do
		{
			cout << char(alphabet + k) << " ";

		} while (++k <= rows);
		cout << "\n";

	} while (--i >= 1);
}

Enter Sandglass Pattern of Alphabets Rows = 15
Printing Sandglass Alphabets Pattern
 A B C D E F G H I J K L M N O 
  B C D E F G H I J K L M N O 
   C D E F G H I J K L M N O 
    D E F G H I J K L M N O 
     E F G H I J K L M N O 
      F G H I J K L M N O 
       G H I J K L M N O 
        H I J K L M N O 
         I J K L M N O 
          J K L M N O 
           K L M N O 
            L M N O 
             M N O 
              N O 
               O 
              N O 
             M N O 
            L M N O 
           K L M N O 
          J K L M N O 
         I J K L M N O 
        H I J K L M N O 
       G H I J K L M N O 
      F G H I J K L M N O 
     E F G H I J K L M N O 
    D E F G H I J K L M N O 
   C D E F G H I J K L M N O 
  B C D E F G H I J K L M N O 
 A B C D E F G H I J K L M N O