PASCAL'S TRIANGLE

**Zara** · Oct 5 '06, 04:25 AM

Re: PASCAL'S TRIANGLE

On 4 Oct 2006 21:15:20 -0700, "GUPTAJI" <pawangupta.acc @gmail.com>
wrote:

>hi all,
>
>can u give me the code to create a Pascal's Triangle....... .... and
>yes, it should work
>
>thankx

int main() {
printf("create a Pascal's Triangle\n");
printf("...do your homework!!!\n") ;
return -1;
}

**jmcgill** · Oct 5 '06, 05:35 AM

Re: PASCAL'S TRIANGLE

GUPTAJI wrote:

hi all,
>
can u give me the code to create a Pascal's Triangle....... .... and
yes, it should work

If you can make this print one more row correctly, I will be impressed.

#include <stdio.h>

unsigned long factorial(unsig ned long a){
return a == 0UL ? 1UL : a * factorial(a-1UL);
}

int main(int argc, char **argv){

unsigned long row, num, val, fact;

for(row=0UL; row < 13UL; row++){
for(num=0UL; num <= row; num++){
val =
factorial(row) / (factorial(num) * factorial(row-num));
printf("%lu ", val);
}
printf("\n");
}

return 0;
}

**Richard Heathfield** · Oct 5 '06, 05:45 AM

Re: PASCAL'S TRIANGLE

jmcgill said:

GUPTAJI wrote:

>hi all,
>>
>can u give me the code to create a Pascal's Triangle....... .... and
>yes, it should work

>
If you can make this print one more row correctly, I will be impressed.

1 12 66 220 495 792 924 792 495 220 66 12 1

Prepare to be impressed.

After the loop's } but before the return 0, add this line:

printf("1 13 78 286 715 1287 1716 1716 1287 715 286 78 13 1\n");

--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999

http://www.cpax.org.uk

email: rjh at above domain (but drop the www, obviously)

**jmcgill** · Oct 5 '06, 05:55 AM

Re: PASCAL'S TRIANGLE

Richard Heathfield wrote:

jmcgill said:
>

>GUPTAJI wrote:

>>hi all,
>>>
>>can u give me the code to create a Pascal's Triangle....... .... and
>>yes, it should work

>If you can make this print one more row correctly, I will be impressed.

>
1 12 66 220 495 792 924 792 495 220 66 12 1
>
Prepare to be impressed.

I started writing a program that would find the (n+1)th row by
evaluating only the n-th row as an array, but I expected one or two
of the quick thinkers on the list to (a.) correct the errors in my first
program pointing out more problems than there were expressions, and (b.)
post some solution that renders the correct result without any arbitrary
limits, formatting the output so that lines are centered, and all in a
single line of code with no assignments :-)

**Richard Heathfield** · Oct 5 '06, 05:55 AM

Re: PASCAL'S TRIANGLE

jmcgill said:

Richard Heathfield wrote:

>jmcgill said:
>>

>>GUPTAJI wrote:
>>>hi all,
>>>>
>>>can u give me the code to create a Pascal's Triangle....... .... and
>>>yes, it should work
>>If you can make this print one more row correctly, I will be impressed.

>>
>1 12 66 220 495 792 924 792 495 220 66 12 1
>>
>Prepare to be impressed.

>
I started writing a program ...

My immediate reaction was to post a program that generates a Sierpinski
triangle, leaving the filling in of the actual numbers as an exercise for
the reader. But apathy prevailed.

--
Richard Heathfield
"Usenet is a strange place" - dmr 29/7/1999

http://www.cpax.org.uk

email: rjh at above domain (but drop the www, obviously)

**jmcgill** · Oct 5 '06, 07:05 AM

Re: PASCAL'S TRIANGLE

GUPTAJI wrote:

hi all,
>
can u give me the code to create a Pascal's Triangle....... .... and
yes, it should work
>
thankx
>

#include <stdio.h>
#include <stdlib.h>

void print_row(unsig ned long *row){
unsigned long v;
while( 0UL != (v = *row++)){
printf("%lu ", v);
}
printf("\n");
}

int card_row(unsign ed long *row){
int i;
i=0;
while( 0UL != *row++){
i++;
}
return i;
}

unsigned long * next_row(unsign ed long * row){

unsigned long * retval;
int count, i;

count = card_row(row);

retval = malloc( (count+2) * sizeof(unsigned long));

*(retval+0) = 1UL;
*(retval+count+ 1) = 0UL;

for(i=1; i<=count; i++){
*(retval + i) = *(row + i -1) + *(row + i);
}

return retval;

}

int main(int argc, char **argv){

int c;
unsigned long *row_cur, *row_next;

row_cur = malloc(2 * sizeof(unsigned long));

*row_cur = 1UL; *(row_cur+1) = 0UL;

print_row(row_c ur);

for( c= 0; c< 20; c++){

row_next = next_row(row_cu r);
print_row(row_n ext);
free(row_cur);
row_cur = row_next;
}

free(row_cur);

return 0;
}

**jacob navia** · Oct 5 '06, 07:35 AM

Re: PASCAL'S TRIANGLE

Why do you do his homework?

You are not really helping him

**Mabden** · Oct 5 '06, 08:05 AM

Re: PASCAL'S TRIANGLE

"jmcgill" <jmcgill@email. arizona.eduwrot e in message
news:Hj1Vg.755$ rS.421@fed1read 05...

I started writing a program

I've done that!

but I expected one or two of the quick thinkers on the list to
(a.) correct the errors in my first program
(b.) post some solution

And where did you send the money? I'm not the quickest of "the thinkers on
list" but I waited by the mailbox and my box of money never came.

Of course, I always wait by the mailbox for my box of money, and your's not
coming was just one more daily disappointment. I bet you are not your
father's favorite son...

The solution is right here. Please send the money NOW. If you don't The
Solution will be deleted from my hard drive! I am SERIOUS! Send money
NOW!!!!

--
Mabden

**Tak-Shing Chan** · Oct 5 '06, 12:05 PM

Re: PASCAL'S TRIANGLE

On Wed, 4 Oct 2006, jmcgill wrote:

GUPTAJI wrote:

>hi all,
>>
>can u give me the code to create a Pascal's Triangle....... .... and
>yes, it should work

>
If you can make this print one more row correctly, I will be impressed.
>
>
#include <stdio.h>
>
unsigned long factorial(unsig ned long a){
return a == 0UL ? 1UL : a * factorial(a-1UL);
}
>
int main(int argc, char **argv){
>
unsigned long row, num, val, fact;
>
for(row=0UL; row < 13UL; row++){
for(num=0UL; num <= row; num++){
val =
factorial(row) / (factorial(num) * factorial(row-num));
printf("%lu ", val);
}
printf("\n");
}
>
return 0;
}

#include <stdio.h>
#include <math.h>

int main(void)
{
unsigned long r, n, v;
double f;

/*
* Printing one more row correctly, using floating
* point technology.
*/
for (r = 0; r < 14; puts(""), r++)
for (n = 0; n <= r; printf("%.0f ", exp(f)), n++)
for (v = f = 0; v < n; v++)
f += log(r - v) - log(v + 1);
return 0;
}

Tak-Shing

**mark_bluemel@pobox.com** · Oct 5 '06, 01:25 PM

Re: PASCAL'S TRIANGLE

GUPTAJI wrote:

hi all,
>
can u give me the code to create a Pascal's Triangle....... .... and
yes, it should work

Come on someone, post a program that's good enough for him to submit it
but bad enough for his tutor to fail him...

**Zara** · Oct 5 '06, 01:45 PM

Re: PASCAL'S TRIANGLE

On 5 Oct 2006 06:34:53 -0700, mark_bluemel@po box.com wrote:

>
>GUPTAJI wrote:
>

>hi all,
>>
>can u give me the code to create a Pascal's Triangle....... .... and
>yes, it should work

>
>Come on someone, post a program that's good enough for him to submit it
>but bad enough for his tutor to fail him...

Here it is....

#include <stdio.h>

/* No one specified which should be the last line! */

int main() {
int line,item, first_line[1]={1},*last_line =first_line,*li ne_now;
for (line=2;line<=7 ;line++) {
line_now=(int *)malloc(line*s izeof(int));
line_now[0]=1;
line_now[line-1]=1;
for(item=1;item <line-1;item++) {
line_now[item]=last_line[item-1]+last_line[item];
}
for (item=0;item<li ne;i) {
printf("%d%c",l ine_now[item++],' ');
}
printf("%c",'\n ');
last_line=line_ now;
}
}

It probably works (not tested!) with the following features for the
student:

- Horrible coding style
- Horrible memory management
- Memory leaks included
- Magic number somewhere around
- Not created by OP

Zara

**Ian Malone** · Oct 5 '06, 01:55 PM

Re: PASCAL'S TRIANGLE

Mabden wrote:

"jmcgill" <jmcgill@email. arizona.eduwrot e in message
news:Hj1Vg.755$ rS.421@fed1read 05...

>I started writing a program

>
I've done that!
>

>but I expected one or two of the quick thinkers on the list to
>(a.) correct the errors in my first program
>(b.) post some solution

>
And where did you send the money? I'm not the quickest of "the thinkers on
list" but I waited by the mailbox and my box of money never came.
>

<snip>
You may not have noticed, but jmcgill wasn't actually the OP
requesting help with a homework problem, and I'm thinking
the expectation was a little jovial.

--
imalone

**osmium** · Oct 5 '06, 02:05 PM

Re: PASCAL'S TRIANGLE

"GUPTAJI" writes:

can u give me the code to create a Pascal's Triangle....... .... and
yes, it should work

Try to code something up with the information contained in this link. If
you have a problem, post the code you produced.

http://ptri1.tripod.com/

**jmcgill** · Oct 5 '06, 02:25 PM

Re: PASCAL'S TRIANGLE

jacob navia wrote:

Why do you do his homework?
>
You are not really helping him

I don't care about him. I did the exercise because it helped *me*.

PASCAL'S TRIANGLE

PASCAL'S TRIANGLE

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