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

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

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

/*
Output:

Enter the number of lines: 4
Required pattern is as follows:
      A
    B  B
  C  C  C
D  D  D  D

*/




