15 Jun 2006

Try The 'C' Code !

Here comes a challenge for Computer Engineers !

int i, n = 20;
for (i = 0; i < n; i--)
{
printf("X");
}

By only changing or adding ONLY ONE character to the above code:

Find 3 ways to make the above code print X 20 times!

-The Big K-
p.s: This challenge will be open for all CEans untill someone cracks it. Do *not* expect an answer from me.
sristi

sristi

Branch Unspecified
15 Jun 2006
1)
int i, n = 20;
for (i = 0; i < n; i++)
{
printf("X");
}


2)int i,n=20;
for(i=0;i++<n😉
{
print("X");
}


3)
int i, n = 20;
for (i = 0; ++i < =n; )
{
printf("X");
}
15 Jun 2006
That was a nice attempt [​IMG]

But you missed this -

By only changing or adding ONLY ONE character to the above code:
😉

-The Big K-
Jerry

Jerry

Branch Unspecified
15 Jun 2006
working on it

sristi
1)
int i, n = 20;
for (i = 0; i < n; i++)
{
printf("X");
}
yeh, you changed -- to ++ , that is you changed two characters. However you are allowed to change only one chracter from the code. Really interesting, I'm working on it !😉
crook

crook

Branch Unspecified
16 Jun 2006
I'm not a C programmer but this is more of a logic problem. Should not take more time. Let me see what can I do about it.

crook
17 Jun 2006
probably I should start giving out hints!

Cummont fellaz, do you really need them? [​IMG]

-The Big K-
crook

crook

Branch Unspecified
17 Jun 2006
got it

i think i got it.

in the original code, make the following change

for (i = 0; i < n; n--)

it should work! now trying the remaining two methods 😁
crook

crook

Branch Unspecified
25 Jun 2006
here comes the second way - 😁

int i, n = 20;
for (i = 0; -i < n; i--)
{
printf("X");
}
and the third 😁

int i, n = 20;
for (i = 0; i + n; i--)
{
printf("X");
}
crook

crook

Branch Unspecified
25 Jun 2006
New Challenge !

This is a simple C puzzle for you -

"Write a "Hello World" program in 'C' without using a semicolon."

Try it, its very simple.

CrooK
Jerry

Jerry

Branch Unspecified
25 Jun 2006
int i, n = 20;
for (i = 0; -i < n; i--)
{
printf("X");
}

will this work? 😒

I don't have a compiler to try this out. I have started working on crook's problem. Its been quite sometime since I letf coding 😔
pradypop

pradypop

Branch Unspecified
28 Jun 2006
main(){if(printf("Hello world")){}}

This might print hello world. No semi-colons used.
crook

crook

Branch Unspecified
28 Jun 2006
yes, thats a correct solution! 😀
rajeshkumar.km

rajeshkumar.km

Branch Unspecified
07 Aug 2006
my guesss

😉
int i, n = -20;
for (i = 0; i < n; i--)
{
printf("X");
}

i think the above change ( minus sign before 20 in the line 'int i,n=20')will respond to your view correctly
crook

crook

Branch Unspecified
08 Aug 2006
rajeshkumar.km
😉
int i, n = -20;
for (i = 0; i < n; i--)
{
printf("X");
}

i think the above change ( minus sign before 20 in the line 'int i,n=20')will respond to your view correctly
😕 I'm afraid the logic won't work.

Croook
devi prasad

devi prasad

Branch Unspecified
10 Aug 2006
ans:

first method:

int i, n = -20;
for (i = 0; i < n; i--)
{
printf("X");
}


second method :


int i, n = 20;
for (i = 0; i < -n; i--)
{
printf("X");
}


third method:


int i, n = 20;
for (i = 20; i < n; i--)
{
printf("X");
}


😁
Mahesh

Mahesh

Branch Unspecified
07 Oct 2006
third method:


int i, n = 20;
for (i = 20; i < n; i--)
{
printf("X");
}



How can this work? This is an infinite loop.
07 Oct 2006
Mahesh
third method:


int i, n = 20;
for (i = 20; i < n; i--)
{
printf("X");
}



How can this work? This is an infinite loop.
 for (i = 20; i < n; i--)
Good Catch, Mahesh 😀 . Devi Prasad might want to fix it.

-The Big K-
bantini

bantini

Branch Unspecified
10 Oct 2006
how about (i=0;i<n:-i--)?😕 hey dude,just a lame attempt from an amateur!!!dunno much about c anyway!
pradypop

pradypop

Branch Unspecified
11 Oct 2006
Mahesh
third method:


int i, n = 20;
for (i = 20; i < n; i--)
{
printf("X");
}



How can this work? This is an infinite loop.
I don't think there's an infinite loop in the code. Infact, statements inside loop are not executed even once.

n=20, i=20 at initilization and condition is i<n, 20<20 is not true. Condition fails straightaway.
Mahesh

Mahesh

Branch Unspecified
11 Oct 2006
Still the program is wrong.Can you give correct solution?
pradeep_agrawal

pradeep_agrawal

Branch Unspecified
18 Oct 2006
/* 1st Way: Change i in i-- by n*/
int i, n = 20;
for (i = 0; i < n; n--)
{
printf("X");
}


/* 2nd Way: Add - before i in i < n */
int i, n = 20;
for (i = 0; -i < n; i--)
{
printf("X");
}


/* 3rd Way: Change < in i < n by + */
int i, n = 20;
for (i = 0; i + n; i--)
{
printf("X");
}
Prasad Ajinkya

Prasad Ajinkya

Branch Unspecified
19 Oct 2006
This is decent enough, hope the 3 ways are as follows -

int i, n = 20;
for (i = 0; i < -n; i--)
{
printf("X");
}


int i, n = 20;
for (i = 40; i < n; i--)
{
printf("X");
}

int i, n = 20;
for (i = 0; i > n; i--)
{
printf("X");
}

I have indicated in red the change in character that I have made.
ksrbhanu

ksrbhanu

Branch Unspecified
03 Nov 2006
Hi friends,

I have one method, i will try other two. mean while review this method

int i, n = 20;
for (i = 0; i < n; n--)
{
printf("X");
}

replacing the i in the decrement statement with n it works , this is one character change 😎
ksrbhanu

ksrbhanu

Branch Unspecified
03 Nov 2006
sory guys, i have n't checked the whole chain , pradeep has already posted this metho 😔
spirit

spirit

Branch Unspecified
09 Nov 2006
hello.....i m giving your answer n u have to tell thats right or not.....😎
this is your code........
int i, n = 20;
for (i = 0; i < n; i--)
{
printf("X");
}
1. instead of i-- in the loop,change it as n--.
2.in initialisation,n=20,change it as:n=-20.
3.instead of i--,use:i++.

😁
rahul dev choud

rahul dev choud

Branch Unspecified
16 Jan 2007
hey its really interesting don't tell da ans...

working on it ....

w'll back soon......

Share this content on your social channels -

Only logged in users can reply.