CBFalconer said:#include <stdio.h>
int main(void) {
int i, sum;
for (i = sum = 0; i < 20; i++)
if (!(i & 1)) sum += i;
printf ("Sum = %d\n", sum);
return 0;
}
but you can't enter that in your machine with your broken shift
key.
Richard said:Richard Tobin said:#include <stdio.h>
int total(int n)
{
[...]
Unfortunately this program does not conform to the C standard.
Um, why not? Looks fine to me.
Exactly. For all we know, one of these posters could in fact be
someone like that. Or maybe we have a sophomore who scored
high grades in his freshman year but has experienced a personal
tragedy in his first few weeks back and needs a small boost
while he's getting himself back in order. Many variables at
play.
When something bad happens, the bad thing can teach us a lesson the
same way as when a good thing happens.
In none of the hypothetical situations presented in this thread does
giving the person a finished homework problem seem like a good
solution to me.
Harald van D?k said:total is reserved as an external identifier for use by the implementation.
Think about the following scenario:
1) Somebody's almost failing a course, and subsequently flunking
out of school, and they're getting desperate (and face it,
you'd have to be pretty desperate to be looking for help in
this loony place known as CLC).
2) Said person's parents are threatening to cut off funding if
said person flunks out. Also comments to the effect of
bringing shame on the family...
3) Said person looks for help on CLC and gets the usual
treatment, and subsequently kills himself.
You want that on your conscience?
Sure, but you won't learn anything from it.
/***********************/
#include <stdio.h>
int sum(int input);
int main(void)
{
int a;
a = sum(20);
printf("The sum is: %d\n", a);
return 0;
}
int sum(int input)
{
int temp = input / 2;
return temp * (temp + 1);
}
/***********************/
[...]user923005 said:[snip]Kenny McCormack wrote:
This is analogous to:
A man is drowning, and you have a rope. Should you save him?
It might be Hitler or someone worse than Hitler. So don't save him.
COULD YOU PLEASE SOLVE THE FOLLOWING QUESTION.
WRITE A PROGRAM IN C THAT WILL CALCULATE THE SUM OF EVEN NUMBERS FROM
0 TO 20?
Why?
Actually it's pretty ugly and wouldn't pass a first year code review.
Han from China said:That may be true in your personal experience. I note that much of
what you're saying may be true in your personal experience but
not in that of others. For many people in the world, life doesn't
reflect the Pollyanna-ish platitudes found in self-help books,
Hollywood dramas, and fortune cookies. For these people, there's
no such thing as fate, order, and teleology. Life is pretty much
a cruel crapshoot in which receiving an answer on a newsgroup
can swing one's fortune either way.
[/QUOTE]total is reserved as an external identifier for use by the implementation.
Is there a way to know this kind of esoterica without studying the standard?
Ideally a list of "gotchas".
Richard said:osmium <[email protected]> wrote:
It would be straightforward for compilers to (optionally) warn about
any reserved identifiers that they don't know to exist. Of course the
compiler could be out of sync with the library, but I think it would
be useful when writing "must conform as closely as possible" code.
Harald van Dijk said:Why did you snip the attribution line for the below, which was present in
osmium's message?
The problem with that is that reserved identifiers that are unused by the
library are not a problem in practice.
Lew said:First observation: this only counts even integers that range from
0 to 19. Was this intentional?
2nd observation: this seems a bit obfuscated to me (given that
the for() loop can take /any/ expression as the third expression).
A clearer "addition" solution might be
#include <stdio.h>
int main(void) {
int i, sum;
for (i = sum = 0; i <= 20; i = i + 2) /* even numbers from 0 to 20 */
sum = sum + i;
/* yes, I know about +=. But, does the OP? */
printf("Sum = %d\n",sum);
return 0;
}
Harald said:Richard said:Richard Tobin said:
#include <stdio.h>
int total(int n)
{
[...]
Unfortunately this program does not conform to the C standard.
Um, why not? Looks fine to me.
total is reserved as an external identifier for use by the
implementation.
pete said:CBFalconer said:Harald said:Richard Heathfield wrote:
Richard Tobin said:
#include <stdio.h>
int total(int n)
{
[...]
Unfortunately this program does not conform to the C standard.
Um, why not? Looks fine to me.
total is reserved as an external identifier for use by the
implementation.
Where is this specified?
N869
7.26
[#1]
7.26.2
[#1]
CBFalconer said:pete said:CBFalconer said:Harald van D?k wrote: [...
total is reserved as an external identifier for use by the
implementation.
Where is this specified?
N869
7.26
[#1]
7.26.2
[#1]
I find no such section in either n869 or n1256.
I only ever keep one level of attribution. I've discussed this here
before, and I'm not going through it again.
They're not a problem *now*, but they might be in the future when
new functions are added.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.