/* Pattern Problem
A B C D
  A B C
    A B
      A
*/

#include  <stdio.h>
#include  <conio.h>

void main()
{
    int  i, j ;
    clrscr() ;
    printf("Required pattern is as follows: \n") ;
    for(i=4 ; i>=1 ; i--)
        {
            /* Managing spaces */
            for(j=4-i ; j>=1 ; j--)
                printf("  ") ;
            /* Printing from left to Centre */
            for(j=1 ; j<=i ; j++)
                printf("%c ", j+64) ;
            printf("\n") ;
        }
    getch();
}

/*
Output:

Required pattern is as follows:
A B C D
  A B C
    A B
      A
*/