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possible combination of a string

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Join Date: Dec 2006

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vijayr_singh vijayr_singh is offline

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possible combination of a string

Dec 13th, 2006

Hi friends...

I need to write a program in C which will print all the combinations of a string with non-repeating characters. Example: “Say” will have the following: S, a,y, Sa, Sy, aS,Sy, yS, ya, aSy,Sya,ySa and so on. The string length is not known. The string will be a command line argument to the program.

The code that i have goes below but its not giving me the desired output. the output that i m getting from this program is like

#############OUTPUT##################
Enter the string : say

sya
ysa
yas
ays
asy
say
##################################

#############DESIRED OUTPUT##################
Enter the string : say

s
a
y
sa
sy
as
ys
ay
ya
sya
ysa
yas
ays
asy
say
###########################################

###########PROGRAM################

 Help with Code Tags 
 c Syntax (Toggle Plain Text) 
#include<stdio.h>
#include<string.h>
#include<alloc.h>
#include<conio.h>
 
 
void swap(char*,int);
void gotoloop(char*,int);
 
void main()
{
char *ch;
int i,j,k,l;
ch=(char*)malloc(20);
//clrscr();
printf("Enter the string\n");
gets(ch);
 
l=strlen(ch);
gotoloop(ch,l);
 
return;
}
 
void gotoloop(char *ch,int l)
{
int i,k;
k=l;
 
if(l<=1) 
return;
 
 
for(i=0;i<k;i++)
{
swap(ch,k);
l--;
gotoloop(ch,l);
l++;
if(k==2)
printf("\n%s ",ch);
}
 
}
 
 
void swap(char *ch,int r)
 
{
char c;
int i;
 
c=ch[r-1];
for(i=r-1;i>0;i--)
ch[i]=ch[i-1];
ch[0]=c;
}
#include<stdio.h>
#include<string.h>
#include<alloc.h>
#include<conio.h>


void swap(char*,int);
void gotoloop(char*,int);

void main()
{
char *ch;
int i,j,k,l;
ch=(char*)malloc(20);
//clrscr();
printf("Enter the string\n");
gets(ch);

l=strlen(ch);
gotoloop(ch,l);

return;
}

void gotoloop(char *ch,int l)
{
int i,k;
k=l;

if(l<=1) 
return;


for(i=0;i<k;i++)
{
swap(ch,k);
l--;
gotoloop(ch,l);
l++;
if(k==2)
printf("\n%s ",ch);
}

}


void swap(char *ch,int r)

{
char c;
int i;

c=ch[r-1];
for(i=r-1;i>0;i--)
ch[i]=ch[i-1];
ch[0]=c;
}

This is not like a normal permutation of string.

Can anyone help me on this ASAP.

Thanks in advance

Last edited by ~s.o.s~; Dec 13th, 2006 at 11:44 am. Reason: Added code tags learn to use them yourself.

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Salem

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Re: possible combination of a string

Dec 13th, 2006

Wow - a full house of forums I've seen the same post on.

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cscgal

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Re: possible combination of a string

Dec 13th, 2006

Huh? Whatcha mean?

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Narue

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Re: possible combination of a string

Dec 13th, 2006

>Huh? Whatcha mean?
He means that this question has been spammed on multiple website forums, such as Daniweb, cprogramming, etc...

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iamthwee

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Re: possible combination of a string

Dec 13th, 2006

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Originally Posted by Narue

>Huh? Whatcha mean?
He means that this question has been spammed on multiple website forums, such as Daniweb, cprogramming, etc...

It could also be interpretated that Salem has so much free time on his hands he can afford to join every c forum in existence.

Although he does spend a lot of time on times.co.uk website. How he can juggle the two I don't know. He he.

Last edited by iamthwee; Dec 13th, 2006 at 6:04 pm.

*Voted best profile in the world*

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Narue

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Re: possible combination of a string

Dec 13th, 2006

>It could also be interpretated that Salem has so much free time on his
>hands he can afford to join every c forum in existence.
Please. Everyone knows that Salem is a bot.

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dileepkumar235 dileepkumar235 is offline

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Code for all possible combinations of a string using GOTO

-1

Jan 18th, 2009

#include <conio.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void main()
{
char a[20],st_char;
static int i,j,k,n,st,ctr,main_ctr;

printf("Enter the string : ");
gets(a);

n=strlen(a);

if(n<=1)
{
printf("please enter a valid string

");
exit(0);
}

label :

for(i=0;i<=n-2;++i)
{
ctr=0;
printf("\n");
printf("%c",a[0]);
for(j=i+1;j<=n-1;j++)
{
printf("%c",a[j]);
ctr++;
}

if(ctr!=n-1)
//while(ctr!=n-1)
{
st=i+1;
for(k=1;k<=st-1;k++)
{
printf("%c",a[k]);
ctr++;
}
}
}

st_char=a[0];
for(i=0;i<=n-2;i++)
a[i]=a[i+1];

a[n-1]=st_char;

main_ctr++;

while(main_ctr<n)
goto label;

printf("Designed by Uday kumar and Dileep Basam ");
getch();
}

Last edited by dileepkumar235; Jan 18th, 2009 at 12:08 pm. Reason: hey sorry guys this will give just permutations of the string

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Freaky_Chris Freaky_Chris is offline

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Re: possible combination of a string

Jan 18th, 2009

Please use code tags!

Amen to Salem being a bot ;P

You posted it everywhere...pretty lame lol. What amazes me is how you managed to come up with code for permutations, but cannot write what appears to be a simple loop....

Chris

Knowledge is power -- But experience is everything

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Aia

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Re: possible combination of a string

Jan 18th, 2009

You missed to read about the forum posting expectations and proper code tagging.
I suggest you stick around and learn why your posted code is not a good example.

Last edited by Aia; Jan 18th, 2009 at 12:30 pm.

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