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NNTP-Posting-Date: Wed, 24 Oct 2012 01:58:53 -0500
Message-ID: <508791B0.4173@mindspring.com>
Date: Wed, 24 Oct 2012 02:58:56 -0400
From: pete <pfiland@mindspring.com>
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Subject: Re: Write a program to print star using * ?
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Xref: csiph.com comp.lang.c:27618

Joe Pfeiffer wrote:
> 
> pete <pfiland@mindspring.com> writes:
> 
> > Nikhil Joshi wrote:
> >>
> >> On Tuesday, October 23, 2012 9:22:33 PM UTC+5:30, Nikhil Joshi wrote:
> >> > guys help me in making thi program?
> >>
> >> main()
> >> {
> >> int i,j;
> >>  for(i=0;i<5;i++)
> >> {
> >>  for(j=i;j<5;j++)
> >> {
> >> printf("*");
> >> printf("\n");
> >> }
> >> }
> >> getch();
> >> }
> >>
> >> this is basic structure printing star..
> >> but dont know how make a program for star?
> >
> > /* BEGIN new.c */
 
> Hey -- don't just do his homework for him!

/* BEGIN star.c output */

                       **
                      ****
                      *****
                     ******
                    ********
                    ***   ***
                   ****  ****
                  ************
                  *************
                 **          **
                ****        ****
                *****       *****
*************************************************
************************ ************************
 ****  ****  ***** ***** ***** *****  ****  ****
 ****   ***  ****  ****  ****  *****  ***   ***
  ********  ************************   ********
   ******   *************************  *******
   ******  **   *****       *****  ***  *****
    ****  ****  ****         ****  ***   ****
     **   *****  ***         ***  *****  ***
     **************           *************
      ************            *************
       ****  *****             ***** *****
       ****  ****              ***** *****
      ************             ************
      *************           *************
     **  ******  **          ***  ** **   **
    ****  ****  ****         ***  *****  ****
    *****  ***  *****       *****  ***  *****
   ******  **************************   ******
  ********  *************************  ********
  ***   *** ****** ***** ***** *****  ***   ***
 ****  ****  ****  ***** ***** *****  ****  ****
****************** ***** ***** ******************
*************************************************
               ******      ******
                ****        *****
                ****         ***
                 **************
                  *************
                  ********* **
                   ****  ****
                    **    ***
                    ********
                     ******
                      *****
                      ****
                       **

/* END star.c output */



/* BEGIN star.c */

#include <stdio.h>
/*
** Running time is O(D*D*D*D)
*/
#define D           50
#define NMEMB(A)    (sizeof (A) / sizeof *(A))   

int 
main(void)
{
    size_t i, j, x, y;
    char array[D][D + 1];
    char *const a = *array;
    long unsigned seed = 123456789LU;
    const struct {
        size_t x;
        size_t y;
    } point[][3] = {
        {
            {            0, D / 2 - 1},
            {D * 3 / 4 - 1,         0},
            {D * 3 / 4 - 1,     D - 1}
        },
        {
            {        D / 4,         0},
            {        D / 4,     D - 1},
            {        D - 1, D / 2 - 1}
        }
    };

    for (i = 0; i != sizeof array; ++i) {
        a[i] = ' ';
    }
    for (i = 0; i != sizeof array; a[i - 1] = '\n') {
        i += sizeof *array;        
    }
    j = NMEMB(point);
    while (j-- != 0) {
        x = point[j][j].x;
        y = point[j][j].y;
        for (i = 0; i != sizeof array * sizeof array; ++i) {
            seed = seed * 69069LU + 362437LU & 0XFFFFFFFFLU;
            x = (x + point[j][seed % NMEMB(*point)].x) / 2;
            y = (y + point[j][seed % NMEMB(*point)].y) / 2;
            array[x][y] = '*';
        }
    }
    puts("/* BEGIN star.c output */\n");
    for (i = 0; i != sizeof array; ++i) {
        putchar(a[i]);
    }
    puts("/* END star.c output */");
    return 0;
}

/* END star.c */

-- 
pete