whisper("strings")

I am trying to rebuild a string that has already had its initial spaces removed. The problem is I'm not sure the end of the last word gets a '\0' stapled to it or not....ahh The string is user defined and I'm now trying to eliminate internal spaces..and especially any after the last character in the string..here's the function;
too much time has been spent....please throw me a line!!!!

im tryin'

Code:

---

void leading_spaces(char string[])
{
        int        i=0,c=0;

        while(string[i]==' ')  /*gets rid of leading zeros*/
        {
                i++;
        }
        while(string[i]!='\0')  /*rebuilds string w/o leading spaces*/
        {
                string[c]=string[i];
                c++;
                i++;

        }
        string[c]='\0';        /*places terminator after last character*/

}

void all_spaces(char string[])
{
        int i=0,c=0;

                while(string[i]!='\0'&&string[i]!=' ')
                {
                        string[c]=string[i];
                        i++;
                        c++;

                        while(string[i]==' '&&string[i]!='\0')
                        {
                                i++;
                        }
                        while(string[i]!='\0')
                        {
                                i--;
                                string[c]=string[i];
                                c++;
                                i++;
                                puts(string);
                        }
                }
                        string[c]='\0';
}

void display_line(char string[])
{
        int i=0;
        while(string[i]!='\0')
        {
                while(string[i]!=' '&&string[i]!='\0')
                {
                        printf("%c",string[i]);
                        i++;

                }
                if(string[i]!='\0')
                {
                        printf("\n");
                        i++;
                        if(string[i]==' '||string[i]=='\0')
                                string[i]='\0';
                }
        }
}

---

[code][/code]tagged by Salem

>The string is user defined and I'm now trying to eliminate internal spaces
Well...it seems you're doing it the hard way:

Code:

---

#include <stdio.h>
#include <ctype.h>

char *remspace ( char *s )
{
  char *p, *q;
 
  for ( p = q = s; ( *p = *q ) != '\0'; q++ ) {
    if ( !isspace ( *q ) )
      p++;
  }

  return s;
}

int main ( void )
{
  char a[] = "  This    is a  test    ";
 
  printf ( "%s\n", remspace ( a ) );

  return 0;
}

---

-Prelude

I'm confused, what's your question again? Which part are you having problems with, and what exactly are you trying to do with it?

string is a reserved name, so you shouldn't use it.
You can use isspace() to test a character to see if it's a space (meaning white space, \n \t space etc etc)

Here's a function that will remove all spaces from the input string. Maybe this will help you understand one way of doing things.

Code:

---

#include <stdio.h>
#include <ctype.h>

void remove_all_spaces(char *s)
{
    char *p = s;
    if (p != NULL)
    {
        while (*p != '\0')
        {
            if (isspace(*p) == 0)
                *s++ = *p;
            p++;
        }
        *s = '\0';
    }
}

int main(void)
{
    char data[] = "  This is a test  ";
   
    printf("Before: >%s<\n", data);
    remove_all_spaces(data);
    printf("After : >%s<\n", data);
   
    return 0;
}

/*
Output
Before: >  This is a test  <
After : >Thisisatest<
*/

---

[edit]Darn it beat just before submitting!

Im trying to learn c from the book and I was given a set of problems from a friend(without solutions) and the one I am presently working on is the following; allow a user to enter a string of characters and eliminate any leading spaces then eliminate any unwanted spaces within. I knew how to eliminate the leading spaces(see pathetic function) however once I started to eliminate the internal spaces I wasn't quite sure how to retain the single space between words, once I started it seemed I just got deeper and deeper in the &*^%(so I figured if somebody had some better solutions, I could figure it out a bit easier......anyways I'm sure there are tons of different ways to tackle this one....thanks for your valuable time (I know I wasted enough of mine trying to figure it out properly)


cheers

Yet another... and without pointers :D

Code:

---

#include <stdio.h>

#define MAX 80

void spaces(char aString[]);

int main(void)
{
  spaces("    a string with  spaces    .");

  printf("\n\nWell....alrighty then\n");
 
  return 0;
}

void spaces(char aString[])
{
       
  char buff[MAX];
  int store[MAX];
       
  int i, j, k;
       
  j=0;
  k=0;
       
  for(i=0; aString[i] != '\0'; i++)
  {
    if(aString[i] != ' ')
    {
      store[j] = 1;
      buff[k++] = aString[i];
    }
    else
      store[j] = 0;
    j++;
  }
       
  buff[k] = '\0';
       
  printf("%s\n", aString);
  printf("%s\n", buff);
       
  j=0;
       
  for(i=0; buff[i] != '\0'; i++)
  {
    while(store[j++] != 1)
      putchar(' ');
               
    putchar(buff[i]);
  }
}

---

thanks again for the input however i want to keep a space between the words in the string.....the initial user defined string is garbage, thats why i used the user string in the function...I want to edit it for future use....:(

This problem was discussed just 3 or 4 posts ago here.