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-   -   replace the "*" in the above string with " ", a single space character using ANSI C?? (http://www.go4expert.com/forums/replace-string-single-space-character-t5974/)

hardik 22Aug2007 09:03

replace the "*" in the above string with " ", a single space character using ANSI C??
 
ok, I am very new to C programming and i have a problem at hand, i wuld really really appreciate any help plz,



The string is defined as the following:

char * foo = " Baltimore *MD*is*a*really*good*place*to*work*and*play";

Using the smallest amount of code possible, replace the "*" in the above string with " ", a single space character using ANSI C language. The resulting string should be printed out at the end of the program. In addition to a manual examination, the resultant .C file will be compiled with GCC compiler with the "-ansi" flag set and executed to determine success

CAN SOMEBODY HELP PLEASE?

DaWei 22Aug2007 09:31

Re: replace the "*" in the above string with " ", a single space character using ANSI C??
 
We'd be glad to help, however we don't do your work for you. Refer to your lessons, work out some come, and present it for help with any problems you encounter. Be sure to read the "Before you make a query" thread (upper right corner of this page) before you post code -- code snippets should be inside code tags. You can learn about them there.

shabbir 22Aug2007 10:33

Re: replace the "*" in the above string with " ", a single space character using ANSI C??
 
You need to be looping through each member and if some character match is found you need to be replacing it with the new character.

listendinesh 22Aug2007 14:02

Re: replace the "*" in the above string with " ", a single space character using ANSI C??
 
You can also use standered function strtok( ) .Take a char pointer and allocate it memory enough to hold the string.call strtok for tokens and append space at the last of each token and copy first token to string then concadinate others.

listendinesh 22Aug2007 14:05

Re: replace the "*" in the above string with " ", a single space character using ANSI C??
 
also put terminating char in the last of string.

hardik 22Aug2007 17:11

Re: replace the "*" in the above string with " ", a single space character using ANSI C??
 
ok here is the code i made

Code:

#include <stning.h>
char *foo = " Charlotte *NC*is*a*really*cool*place*to*work*and*play";
{
    char delims[]="*";
    char *result = NULL;
    result = strtok ( str, delims );
    while ( result != NULL )
    {
          printf ("result is "\%s"\n", result );
          result = strtok (NULL, delims );
    }
}

can some one help me improve it?

DaWei 22Aug2007 17:12

Re: replace the "*" in the above string with " ", a single space character using ANSI C??
 
He does not want to tokenize the string, he want to replace occurences of one character with other. There's no point in doing it in an unwieldy and inefficient way.

On most operating systems the current string, as defined, wil be const. That is, he will not be able to write to it. This will require copying the string, while replacing the characters on the fly. The terminating zero is already there, it just needs to be included in the copy.

hardik 22Aug2007 17:23

Re: replace the "*" in the above string with " ", a single space character using ANSI C??
 
[QUOTE=hardik]ok here is the code i made

Code:

#include <string.h>

int main (void)
{
    char *foo = " Charlotte *NC*is*a*really*cool*place*to*work*and*play";
    char delims[]="*";
    char *result = NULL;
    result = strtok ( str, delims );
    while ( result != NULL )
    {
          printf ("result is "\%s"\n", result );
          result = strtok (NULL, delims );
    }
    return 0;
}


hardik 22Aug2007 17:24

Re: replace the "*" in the above string with " ", a single space character using ANSI C??
 
[QUOTE=hardik]
Quote:

Originally Posted by hardik
ok here is the code i made

Code:

#include <string.h>

int main (void)
{
    char *foo = " Charlotte *NC*is*a*really*cool*place*to*work*and*play";
    char delims[]="*";
    char *result = NULL;
    result = strtok ( str, delims );
    while ( result != NULL )
    {
          printf ("result is "\%s"\n", result );
          result = strtok (NULL, delims );
    }
    return 0;
}


can someone please explain what is wronge with it? :confused:

DaWei 22Aug2007 18:06

Re: replace the "*" in the above string with " ", a single space character using ANSI C??
 
We normally don't solve people's homework for them, Hardik. We help THEM solve it. It is how one learns. I'm making an exception in this case because you are complicating the problem unduly, and doing the original poster a huge disfavor.
Code:

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

int main (int argc, char* argv[])
{
    // If your OS makes a string defined as follows a const value (most do)
    char *foo = "Charlotte *NC*is*a*really*cool*place*to*work*and*play";
    // then you'll have to make a copy of the string, thusly:
    char *bar = strdup (foo);
    // or you may just define the string differently, thusly:
    char baz [] = "Charlotte *NC*is*a*really*cool*place*to*work*and*play";

    // In any even, you make the substitution like this:
    char *replace = baz;
    printf ("%s\n", baz);
    while (*replace)
    {
        if (*replace == '*') *replace = ' ';
        replace++;
    }

    printf ("%s\n", baz);
        return 0;
}

Quote:

Originally Posted by Output
Charlotte *NC*is*a*really*cool*place*to*work*and*play
Charlotte NC is a really cool place to work and play



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