replace the "*" in the above string with " ", a single space character using ANSI C??

hardik's Avatar, Join Date: Aug 2007
Light Poster
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's Avatar, Join Date: Dec 2006
Team Leader
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's Avatar, Join Date: Jul 2004
Go4Expert Founder
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's Avatar, Join Date: Aug 2007
Go4Expert Member
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's Avatar, Join Date: Aug 2007
Go4Expert Member
also put terminating char in the last of string.
hardik's Avatar, Join Date: Aug 2007
Light Poster
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?

Last edited by shabbir; 22Aug2007 at 21:25.. Reason: Code block
DaWei's Avatar, Join Date: Dec 2006
Team Leader
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's Avatar, Join Date: Aug 2007
Light Poster
[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;
}

Last edited by shabbir; 22Aug2007 at 21:28.. Reason: Code block
hardik's Avatar, Join Date: Aug 2007
Light Poster
[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?

Last edited by shabbir; 22Aug2007 at 21:29.. Reason: Code block in quote
DaWei's Avatar, Join Date: Dec 2006
Team Leader
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