/* Pattern Problem
       1
     1 2 A
   1 2 3 A B
 1 2 3 4 A B C
*/

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

void  main()
{
    int  i, j ;
    clrscr();
    printf("Required Pattern is as follows:\n");
    for(i=1 ; i<=4 ; i++)
        {
            /* Managing spaces */
            for(j=1 ; j<=4-i ; j++)
                printf("  ") ;
            /* Prinitng digits*/
            for(j=1 ; j<=i ; j++)
                printf("%d ", j) ;
            /* Printing alphabets*/
            for(j=1 ; j<i ; j++)
                printf("%c ", j+64) ;
            printf("\n") ;
        }
    getch() ;
}

/*
Output:

Required Pattern is as follows:
      1
    1 2 A
  1 2 3 A B
1 2 3 4 A B C
*/