can we write program without loops

[Saurabh Saxena]

can we write the program to write no 1 to n without using
switch,do,while ,for,goto,if and conditional operator where n will be
input by user.

[gabriel]

Saurabh Saxena wrote:

can we write the program to write no 1 to n without using
switch,do,while ,for,goto,if and conditional operator where n will be
input by user.

What, is your whole class coming to the NG for help? :-)

Use recursion -- 'Nuff said

--
gabriel

[Christopher Benson-Manica]

gabriel <[e-mail]> spoke thus:

Saurabh Saxena wrote:

can we write the program to write no 1 to n without using
switch,do,while ,for,goto,if and conditional operator where n will be
input by user.

Use recursion -- 'Nuff said

How will you stop recursing without using conditionals?

--
Christopher Benson-Manica | I *should* know what I'm talking about - if I
ataru(at)cybers pace.org | don't, I need to know. Flames welcome.

[Kevin D. Quitt]

On Thu, 5 Feb 2004 16:44:12 +0000 (UTC), Christopher Benson-Manica
<at***@nospam.c yberspace.org> wrote:

gabriel <[e-mail]> spoke thus:

Use recursion -- 'Nuff said

How will you stop recursing without using conditionals?

Short-circuiting.

--
#include <standard.discl aimer>
_
Kevin D Quitt USA 91387-4454 96.37% of all statistics are made up
Per the FCA, this address may not be added to any commercial mail list

[jacob navia]

"Saurabh Saxena" <sa******@vit.a c.in> wrote in message
news:30******** *************** ***@posting.goo gle.com...

can we write the program to write no 1 to n without using
switch,do,while ,for,goto,if and conditional operator where n will be input by user.

OK OK Here it is:

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

typedef void (*callback)(int );
void zero(int);
void greaterZero(int );

callback callbackTable[2] = {
zero,
greaterZero
};

void zero(int a)
{
exit(0);
}

void greaterZero(int a)
{
printf("%d\n",a--);
callbackTable[a>0](a);
}

int main(int argc,char *argv[])
{
greaterZero(ato i(argv[1]));
return 0;
}

d:\lcc\problem> lcc pb.c
d:\lcc\problem> pb 10

10
9
8
7
6
5
4
3
2
1

I tried to avoid any warnings. A version with error checking
follows...

[jacob navia]

"Saurabh Saxena" <sa******@vit.a c.in> wrote in message
news:30******** *************** ***@posting.goo gle.com...

can we write the program to write no 1 to n without using
switch,do,while ,for,goto,if and conditional operator where n will be input by user.

As promised, here is a version with error
checking

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

typedef void (*callback)(int );
void zero(int);
void greaterZero(int );

callback callbackTable[2] = {
zero,
greaterZero
};

void zero(int a)
{
exit(0);
}

void greaterZero(int a)
{
printf("%d\n",a--);
callbackTable[a>0](a);
}

void errormessage(in t);
void Continue(int);

callback errortable[2] = {
errormessage,
Continue
};

void errormessage(in t a)
{
printf("Wrong input\nUsage:\n pb n, where n>0\n");
exit(1);
}

void Continue(int a)
{
}
int main(int argc,char *argv[])
{
int a;

errortable[argc>1](1);
a = atoi(argv[1]);
errortable[a >0](a);
greaterZero(ato i(argv[1]));
return 0;
}

[nrk]

Christopher Benson-Manica wrote:

gabriel <[e-mail]> spoke thus:

Saurabh Saxena wrote:

can we write the program to write no 1 to n without using
switch,do,while ,for,goto,if and conditional operator where n will be
input by user.

Use recursion -- 'Nuff said

How will you stop recursing without using conditionals?

No. The thing forbidden is the use of the conditional operator (?:).
You're allowed to use logical operators (I assume).

#include <stdio.h>

void print(int n) {
n && (print(n-1), 1) && printf("%d\n", n);
}

int main(void) {
print(10);
return 0;
}

-nrk.

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[Joona I Palaste]

Saurabh Saxena <sa******@vit.a c.in> scribbled the following:

can we write the program to write no 1 to n without using
switch,do,while ,for,goto,if and conditional operator where n will be
input by user.

#include <stdio.h>
int main(void) {
char input[100];
scanf("%100s", input);
printf("1 to %s\n", input);
return 0;
}

--
/-- Joona Palaste (pa*****@cc.hel sinki.fi) ------------- Finland --------\
\-- http://www.helsinki.fi/~palaste --------------------- rules! --------/
"To know me IS to love me."
- JIPsoft

[nrk]

Joona I Palaste wrote:

Saurabh Saxena <sa******@vit.a c.in> scribbled the following:

can we write the program to write no 1 to n without using
switch,do,while ,for,goto,if and conditional operator where n will be
input by user.

#include <stdio.h>
int main(void) {
char input[100];
scanf("%100s", input);
printf("1 to %s\n", input);
return 0;
}

Possible UB.

-nrk.
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Remove devnull for email

[Ed Morton]

Saurabh Saxena wrote:

can we write the program to write no 1 to n without using
switch,do,while ,for,goto,if and conditional operator where n will be
input by user.

I can't imagine any possibile way that this is not a homework
assignment, which begs the question "Why are so many of us immediately
providing solutions instead of guidance?".

Ed.