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How to extract words from char type string

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hinduengg

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How to extract words from char type string

Jun 14th, 2007

HELLO THIS IS MY FIRST POST.

I WISHED IF ANY ONE COULD HELP IN EXTRACTING WORDS FROM A CHAR ARRAY -STRING

LIKE IF THE SENTENCE INPUTTED BY USER - JACK WENT UP
THEN I NEED TO PRINT THESE WORDS SEPARATELY ON FRESH LINES
OUTPUT-
JACK
WENT
UP

I TRIED THIS BUT THIS IS NOT WORKING

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include<iostream.h>
#include<conio.h>
#include<stdio.h>
void main()
char a[100];
int x;
cout<<" enter a sentence";
gets(a);
for(int x=0;a[x]!='\0';x++)
{  
  if(a[x]==' ')
{  
  for(int p=0;p<=x;p++)
   cout<<a[p];
 
  cout<<endl; }
}
}
#include<iostream.h>
#include<conio.h>
#include<stdio.h>
void main()
char a[100];
int x;
cout<<" enter a sentence";
gets(a);
for(int x=0;a[x]!='\0';x++)
{  
  if(a[x]==' ')
{  
  for(int p=0;p<=x;p++)
   cout<<a[p];

  cout<<endl; }
}
}

the output produced is

JACK
JACK WENT
JACK WENT UP

JUST ONE MORE REQUEST THE PROGRAM SHOULD BE DONE ONLY BY SIMPLE CHAR TYPE ARRAYS PLEASE.

I HAVE TRIED THIS QUERY ON OTHER FORUMS BUT ALL ADVICED TO USE "STDL "STRINGS WHICH IS NOT IN MY COURSE.

YOU CAN USE MULTIDIMENSIONAL ARRAYS FOR STORING WORDS

HOPING FOR A SOLUTION

Last edited by ~s.o.s~; Jun 14th, 2007 at 1:10 pm. Reason: Added code tags.

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Join Date: Mar 2007

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FoX_

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Re: How to extract words from char type string

Jun 14th, 2007

Your output is wrong because you're starting the inner for loop at 0 every time.So when a[x] == ' ' it's writing start point to ' '.

You should save the ' ' character's index in a variable and start the loop at this variable.

Finally there is not a ' ' character at the sentence's and so you should repeat the inner for once again outside the first loop(i.e,before return 0).

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include<iostream>
using namespace std;
 
int main(){
 
char a[100];
int x,m = 0,p;
 
cout<<"Enter a sentence"<<endl;
gets(a);
 
for(x=0;a[x]!='\0';x++)
{
        if(a[x]== ' ')
        {
                   for(p=m;p <= x;p++)
                           cout<<a[p];
                   m = x + 1;//For not writing the space character at the //word's lead.You may do m = x;
        }
 
cout<<endl; 
}
 
for(p = m; p <= x;p++)
     cout<<a[p];
 
return 0;
 
}
#include<iostream>
using namespace std;

int main(){
    
char a[100];
int x,m = 0,p;

cout<<"Enter a sentence"<<endl;
gets(a);

for(x=0;a[x]!='\0';x++)
{
        if(a[x]== ' ')
        {
                   for(p=m;p <= x;p++)
                           cout<<a[p];
                   m = x + 1;//For not writing the space character at the //word's lead.You may do m = x;
        }

cout<<endl; 
}

for(p = m; p <= x;p++)
     cout<<a[p];

return 0;

}

And note that "gets()" function is dangereous .Try to fgets() instead.

Last edited by FoX_; Jun 14th, 2007 at 12:22 pm.

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Join Date: Jun 2007

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hinduengg

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Re: How to extract words from char type string

Jun 14th, 2007

Thank you so much for the wonderful solution .
I had been trying so hard to get the correct solution ,THANKS A LOT.

But I have 1 query-
Why gets() is dangerous ,what and how do we use fgets ,I mean is there a special prototype?

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Join Date: Mar 2007

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FoX_

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Re: How to extract words from char type string

Jun 14th, 2007

Your welcome and look at this link:
http://faq.cprogramming.com/cgi-bin/...&id=1043284351

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FoX_

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Re: How to extract words from char type string

Jun 14th, 2007

I mean You're welcome...

Last edited by FoX_; Jun 14th, 2007 at 8:39 pm.

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hinduengg

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Re: How to extract words from char type string

Jun 15th, 2007

I am not good at strings . So please could you help me in getting this question right?

The question is -if the user inputted -' 'JACK WENT UP' '
then the output should be -

UP WENT JACK

I tried to reverse the string from the last space position but that is not working but cant get the second last index having a space .

Please please help!!

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Join Date: Jun 2007

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hinduengg

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Re: How to extract words from char type string

Jun 15th, 2007

Please ,the solution must only include functions related to char type strings or otherwise I will not be able to comprehend .

Well my sir told to transfer the words separately in to the rows of a 2 dimensional array and then print them accordingly,but I am unable to get the hang of it.

Please help.

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~s.o.s~

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Re: How to extract words from char type string

Jun 15th, 2007

Post your latest code so that it would be easier for someone to help you out.

I don't accept change; I don't deserve to live.

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Join Date: Jun 2007

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hinduengg

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Re: How to extract words from char type string

Jun 15th, 2007

iI cant get the hang of it

the code is the same as above

#include<iostream>
using namespace std;

int main(){

char a[100];
int x,m = 0,p;

cout<<"Enter a sentence"<<endl;
gets(a);

for(x=0;a[x]!='\0';x++)
{
if(a[x]== ' ')
{
for(p=m;p <= x;p++)
cout<<a[p];
m = x + 1;//For not writing the space character at the //word's end.
}

cout<<endl;
}

for(p = m; p <= x;p++)
cout<<a[p];
cout<<m<<"last space charecter";

for(int r=m;r>=m;r--)
cout<<a[p];

}

The word order needs to be reversed .(I know want to know how do we get the space positions from end to beginning.)

FOR EXAMPLE-

if you had -' 'JACK WENT UP' '
0-' '
1-J
2-A
3-C
4-K
5-' '
6-W
7-E
8-N
9-T
10-' '
11-U
12-P
13-' '

I want to print words this way- from 10 position to 13 position
from 5 position to 10 position
from 0 position to 5 position

I have tried a lot but not got it correct
Please help me in this !!!

Last edited by hinduengg; Jun 15th, 2007 at 4:28 am.

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pengwn

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Re: How to extract words from char type string

#10

Jun 15th, 2007

the below will reverse your sentence it works.

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include<iostream>
using namespace std;
 
int main(){
    char a[100];
    char b[10][20];
    int x,m = 0,p,wrd = 0, i = 0;
 
    cout<<"Enter a sentence"<<endl;
    gets(a);
 
    for(x=0; a[x] != '\0'; x++) {
        if(a[x] == ' ') {
            for(p=m;p <= x;p++) 
                b[wrd][i++] = a[p];
            b[wrd][i] = '\0';
            m = x + 1;
            wrd++;
            i = 0;
        }
    }
    i=0;
   if(a[x] == '\0')
       for(p=m;p <= x;p++) 
            b[wrd][i++] = a[p];
        b[wrd][i] = '\0';
 
    for(i=wrd; i >= 0 ; i--) {
        int j = 0;
        while( b[i][j] != '\0')
            cout << b[i][j++];
        cout << endl;
    }
}
#include<iostream>
using namespace std;

int main(){
    char a[100];
    char b[10][20];
    int x,m = 0,p,wrd = 0, i = 0;
    
    cout<<"Enter a sentence"<<endl;
    gets(a);
    
    for(x=0; a[x] != '\0'; x++) {
        if(a[x] == ' ') {
            for(p=m;p <= x;p++) 
                b[wrd][i++] = a[p];
            b[wrd][i] = '\0';
            m = x + 1;
            wrd++;
            i = 0;
        }
    }
    i=0;
   if(a[x] == '\0')
       for(p=m;p <= x;p++) 
            b[wrd][i++] = a[p];
        b[wrd][i] = '\0';
        
    for(i=wrd; i >= 0 ; i--) {
        int j = 0;
        while( b[i][j] != '\0')
            cout << b[i][j++];
        cout << endl;
    }
}