Pattern Matching

C Program For Pattern Matching

Source Code:

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

void main()
{
int n,a1,a2,j,k,l,i;
clrscr();
printf("\nEnter number of lines => ");
scanf("%d",&n);
printf("\n\n");

for(i=n;i>=1;i--)
  {
  a1=65;a2=65+i-1;
  for(j=n;j>=n+1-i;j--)
    {
    printf("%c",a1);
    a1=a1+1;
    }

  for(k=1;k<=(2*(n-i+1)-3);k++)
    printf(" ");

  for(l=n;l>=n+1-i;l--)
    {
    if(a2==65+n-1)
      {
      a2=a2-1;
      continue;
      }
    printf("%c",a2);
    a2=a2-1;
    }

  printf("\n");
  }
  getch();
}

     OUTPUT 1:

Enter number of lines => 14


ABCDEFGHIJKLMNMLKJIHGFEDCBA
ABCDEFGHIJKLM MLKJIHGFEDCBA
ABCDEFGHIJKL   LKJIHGFEDCBA
ABCDEFGHIJK     KJIHGFEDCBA
ABCDEFGHIJ       JIHGFEDCBA
ABCDEFGHI         IHGFEDCBA
ABCDEFGH           HGFEDCBA
ABCDEFG             GFEDCBA
ABCDEF               FEDCBA
ABCDE                 EDCBA
ABCD                   DCBA
ABC                     CBA
AB                       BA
A                         A




   OUTPUT 2:

Enter number of lines => 8


ABCDEFGHGFEDCBA
ABCDEFG GFEDCBA
ABCDEF   FEDCBA
ABCDE     EDCBA
ABCD       DCBA
ABC         CBA
AB           BA
A             A