string help stuff...

[Justin Fox]

ok i know this isnt a java question, but this is the best online forum
for programmers so here it goes...

umm, i'm using C in my computer networks class...

and in one program they initiate a character array of a defined BUFFSIZE.

like so:

char buff[BUFFSIZE];

and they use readln to get user input and store it into that array.

like so:

    
while(int len = readln(buff,BUFFSIZE) > 0)
{  (void)send(conn,buff,len,0); }

now, i want to send an error message if, when i try to read a file,
it returns null..

i know how to create a char[] but how do i store the string

say: " file did not exist, was created" into the char[] in C

please help me,


Justin

[Srinivas Kalvala]

Hello,

memcopy() and memset() will help. Try them

Refer:

Unix Network programming by Stevens

[Henry Wong]

As already mentioned, in order to copy strings around, you can use the memcopy() function. To create a string with a value, I believe it is...

  char errstr[] = "file did not exist, was created";

Of course, my "C" is incredibly rusty...
Henry

[Jesper de Jong]

Note that in C it should be memcpy without the o, not memcopy. For strings you should use strcpy instead of memcpy.

#include <stdio.h>
#include <string.h>
 
#define BUFFSIZE 200
 
int main(int argc, char* argv[]) {
    char buff[BUFFSIZE];
 
    strcpy(buff, "file does not exist, was created");
 
    printf(buff);
    printf("\n"); 
 
    return 0;
}

[ September 14, 2006: Message edited by: Jesper Young ]

[Rusty Shackleford]

http://www.programmersheaven.com/c/MsgBoard/grouplist.asp?Setting=A0001F2001 has a bunch of great C boards, along with lots of other subjects. I think it is the best all around programming board. The Java boards are pretty dead, but the boards labeled C/C++ are quite active and the regulars are not only nice, but extremely knowledgable in CS topics.

It sounds like you are in need of a good beginners book. Didn't this class have C as a prereq? A Book on C is an outstanding book that covers ANSI C. And as noted, Unix Network Programming is the definitive networking book, although it actually expects the reader to be comfortable in the basics of C, which is more then fair.