#include <iostream>
using namespace std;
int main () 
{
	char letter, last;
	char row, col;
 
	cout << "Entre a letter: ";
	cin >> letter;
	letter = toupper(letter);
 
	for (row = 0; row < letter; row++)
		{
			for (col = 0; col <= row; col++)
				cout << letter ;
				last = letter;
				 cout << last << letter<< letter--;
				 cout << endl;
		}
    return 0;
}

#include<iostream>
#include<cctype>
using namespace std;
 
struct node
{
     char letter;
     node *next;
};
 
int main()
{
     node *head_ptr = new node;
     node *list = head_ptr;
     int counter = 0;
     char input, ans;
 
     do{
 
               cout << "\nEnter a letter:  ";
               cin >> input;
 
               list->letter = toupper(input);      
               list->next = new list;
               list = list->next;
 
               counter++;
 
               cout << "\nWould ye' like to enter another letter? (Y/N) ";
               cin >> ans;                     
 
          }while(toupper(ans) == 'Y');
 
          list->next = NULL;
          list = head_ptr;
 
          int j=1;
          while(list)
          { 
               for(int i=0;  i<j && list; i++)
               {
                    cout << list->letter; 
                    list = list->next;
               }
 
               cout << endl;
               j++;
          }
 
         list = head_ptr;
         node temp;
 
          while(list)
          {
               temp = list;
               list = list->next;
               delete temp;               
          }         
 
return 0;
}

{
	char letter, maxrow;
	char row, col;
 
	cout << "Enter a letter: ";
	cin >> letter;
	letter = toupper(letter);
	maxrow = letter;
 
	for (row = 'A'; row <= maxrow; row++)
 
	{
		for (col = 'A'; col <= row; col++, letter--)
			cout << letter;
		cout<< endl;
		letter=maxrow;	
 
	}
    return 0;
}