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Full Discussion: questions in memset
Top Forums UNIX for Dummies Questions & Answers questions in memset Post 302130997 by jim mcnamara on Wednesday 8th of August 2007 04:01:28 PM
Old 08-08-2007
Your code has a lot of errors. I'm surprised it compiles at all.
Code:
char *t[100];
char *f[100];
char buf[60];
memset(buf,0,50); /* should be memset(buf, 0, 60); because buf[60] is 60 bytes long*/

/*after that i am assigning memory */

for (i=0; i<100; i++)
{
    t[i] = buf+(i*6);  /* unsigned char allows values 0-255 100*6 = 600 plus buf is a pointer which can be any value */
    f[i] = "ARUN";   /* you have no allocated memory for the pointer, all 100 of them */
}

I cannot believe this runs "correctly" anywhere.
IF this is homework, please do not ask homework questions. I have trouble beleiving this is for production work.
 

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LEARN ABOUT PLAN9

memset

MEMSET(3)						     Linux Programmer's Manual							 MEMSET(3)

NAME

       memset - fill memory with a constant byte

SYNOPSIS

       #include <string.h>

       void *memset(void *s, int c, size_t n);

DESCRIPTION

       The memset() function fills the first n bytes of the memory area pointed to by s with the constant byte c.

RETURN VALUE

       The memset() function returns a pointer to the memory area s.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       +----------+---------------+---------+
       |Interface | Attribute	  | Value   |
       +----------+---------------+---------+
       |memset()  | Thread safety | MT-Safe |
       +----------+---------------+---------+
CONFORMING TO

       POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.

SEE ALSO

       bstring(3), bzero(3), swab(3), wmemset(3)

COLOPHON

       This  page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

GNU
								    2017-03-13								 MEMSET(3)
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