Pattern {Alphabet Equi Triangle}

#include<stdio.h>
#include<conio.h>
void main()
{
      char ch = 'A';
      int n, c, k, space = 0;
      clrscr();
      scanf("%d", &n);
      for ( k = n ; k >= 1 ; k-- )
      {
          for ( c = 1 ; c <= space ; c++)
              printf(" ");
          space++;
          for ( c = 1 ; c <= k ; c++ )
          {
             printf("%c ", ch);
             ch++;
          }
          printf("\n");
          ch = 'A';
      }
      getch();
}

A B C D E F G H
 A B C D E F G
  A B C D E F 
   A B C D E
    A B C D 
     A B C
      A B
       A