problems in removing white spaces from string of text

**monil** · 03-08-2005

Hi,

I need to write a program that shall strip all white spaces from a given string with just 1 space after each word.

Eg. If I give the following string

Code:

rm        asd.txt   tmp.txt                 hgfh.txt

Note: There are training spaces in beginnign and the end...

It should return me

Code:

rm asd.txt tmp.txt hgfh.txt

Also, After the tring is formatted properly, i need to pair up the 1st and the next word.

Like

Code:

rm asd.txt
rm tmp.txt
rm hgfh.txt

Heres the code that i am using...

Code:

#include <stdio.h>
#include <string.h>

int main()
{
  char tmp[100], cmd[100], arg[100];
  int cnt=0, spc_cnt=0, i;

  for(cnt=0; cnt < 100; cnt++)
{
    tmp[cnt] = NULL;
    cmd[cnt] = NULL;
    arg[cnt] = NULL;
}

printf("Please enter some text... ");
gets(tmp);

i=0;
for(cnt=0; ( cnt<100 ) || (tmp[cnt] == NULL); cnt++)
{
        if( tmp[cnt] == ' ' )
        {
                ;
        }
        else
        {
                for( ; (cnt<100) || (tmp[cnt] == NULL); cnt++, i++)
                {
                        if( tmp[cnt] != ' ' )
                        {
                                cmd[i] = tmp[cnt];
                        }
                        else
                        {
                                cmd[i] = ' ';
                                cnt++; i++;
                                break;
                        }
                }
        }
}
  printf("TMP: %s\n", tmp);
  printf("CMD: %s\n", cmd);
  printf("ARG: %s\n", arg);
  return 0;
}

Heres the output I get...

Please enter some text... asd fghfgh rtytr
TMP: asd fghfgh rtytr
CMD: asd ghfgh tytr
ARG:

in CMD, second argument , f is missing... and in third argument, r is missing.

Please help me get away from this error..

Thank you.

-Monil

**quzah** · 03-08-2005

Rather than go through your code, let me tell you a simple way to do this:

Code:

while you're not at the end of your string
    while isspace
        skip this letter
    while !isspace
        copy this character

Naturally you need to check for reaching the end of the string in those two inner loops. But that's the very simple way to do this. There are lots of ways to do this, but that's quite a simple process. And actually, were you yourself to do this by hand, that's exactly the way you'd do it.

Quzah.

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