PATTERN MACHING IN STRINGS

#include<stdio.h>

#include<conio.h>

void main()

{

 int i,k,l=30,j,sum=0,tsum=0;

 clrscr();

 printf("\n Christmas Gift");

 printf("\n\tDay\t\tGifts\t\t  No of gifts per day");

 for(i=1;i<=12;i++)

 {

  printf("\n\t%d\t\t",i);

  sum=1;

  j=1;

  printf("%d",j);

  for(j=2;j<=i;j++)

  {

   printf("+%d",j);

   sum=sum+j;

  }

  for(k=l;k>1;k--)

    printf(" ");

  if(j<10)

   l=l-2;

  else

   l=l-3;

  printf("%d",sum);

  tsum=tsum+sum;

 }

 printf("\nTotal gifts at the 12th day: %d",tsum);

 getch();

}

  output:

 Christmas Gift

        Day             Gifts             No of gifts per day

        1               1                             1

        2               1+2                          3

        3               1+2+3                                                 6

 4               1+2+3+4                                       10

 5               1+2+3+4+5                                   15

 6               1+2+3+4+5+6                               21

7               1+2+3+4+5+6+7                                        28

 8               1+2+3+4+5+6+7+8                                  36

 9               1+2+3+4+5+6+7+8+9                  45

10              1+2+3+4+5+6+7+8+9+10          55

 11              1+2+3+4+5+6+7+8+9+10+11      66

 12              1+2+3+4+5+6+7+8+9+10+11+12    78

Total gifts at the 12th day: 364