When to use Malloc? Post: 86593

10 More Discussions You Might Find Interesting

1. Programming

a problem about malloc()

1 . Thanks everyone who read the post. 2 . the programe is that : #include <stdio.h> #include <string.h> void do_it(char *p) { p = (char *) malloc(100); (void )strcpy(p,"1234"); } int main(void) { char *p; do_it(p); (void )printf("p = %s \n",p);

2. Programming

malloc

hello sir since by mentioning a integer pointer and storing the integers by incrementing the pointer value then what is the purpose of malloc? u can decalre it as in t *p; several integers can be stored by incrementing the value of p, hence what is the diffrence between this...

3. Programming

malloc()

Some one please explain me what is Dynamic memory allocation and the use of malloc() function.How do we allocate memory dynamically and also the other way?

4. Programming

Malloc implementation in C

Hey Guys I am trying to implement the malloc function for my OS class and I am having a little trouble with it. I would be really grateful if I could get some hints on this problem. So I am using a doubly-linked list as my data structure and I have to allocate memory for it (duh...). The...

5. UNIX for Advanced & Expert Users

Malloc Implementation in C

Hey Guys Some of my friends have got together and we are trying to write a basic kernel similar to Linux. I am trying to implement the malloc function in C and I am using a doubly linked list as the primary data structure. I need to allocate memory for this link list (duh...) and I don't feel...

6. Programming

malloc vs realloc

Why when using realloc, john is reversed 3 times but not the other 2 names ? But if I use malloc, then the 3 names are reversed correctly ? (but then there is a memory leak) How can I reverse all 3 names without a memory leak ? char *BUFFER = NULL; char *STRREVERSE(const char *STRING) {...

7. UNIX for Dummies Questions & Answers

Kmalloc and malloc

Do kmalloc and malloc allocate from same heap ?

8. Programming

help with malloc [solved]

Hi i found code in google how to malloc an 2D array and i tried that : #include<stdio.h> #include<stdlib.h> int **A; int **B; int main(int argc,char *argv) { printf("name of text : %s\n",argv); //read arrays int i,j; int l,m; int M,n; FILE *fp; fp=fopen(argv,"r"); ...

9. Programming

malloc vs new speed

Which one is faster among malloc and new? My understanding is that since new also has to call constructors after allocating memory it must be slower than malloc. Am I correct?

10. UNIX for Dummies Questions & Answers

Help with malloc()

Good day! I'm a newbie in C. I'm trying to get an unlimited input from the user using malloc then printing the inputs after the user presses enter. My code works, but there's a warning that I don't know how to fix. Please help me. Thank you. Here's my code: #include <stdio.h> #include...

LEARN ABOUT HPUX

xstr

xstr(1) 						      General Commands Manual							   xstr(1)

NAME

       xstr - extract strings from C programs to implement shared strings

SYNOPSIS

       [file]

DESCRIPTION

       maintains  a  file into which strings in component parts of a large program are hashed.	These strings are replaced with references to this
       common area.  This serves to implement shared constant strings, which are most useful if they are also read-only.

       The command:

       extracts the strings from the C source in name, replacing string references with expressions of the form for some number.   An  appropriate
       declaration  of	is placed at the beginning of the file.  The resulting C text is placed in the file for subsequent compiling.  The strings
       from this file are placed in the database if they are not there already.  Repeated strings  and	strings  that  are  suffixes  of  existing
       strings do not cause changes to the data base.

       After all components of a large program have been compiled, a file declaring the common space, can be created by the command:

       This  file  should then be compiled and loaded with the rest of the program.  If possible, the array can be made read-only (shared), saving
       space and swap overhead.

       can also be used on a single file.  A command:

       creates files and as before, without using or affecting any file in the same directory.

       It may be useful to run after the C preprocessor if any macro definitions yield strings or if there is conditional code containing  strings
       that  are  not,	in  fact,  needed.  reads from its standard input when the argument is given.  An appropriate command sequence for running
       after the C preprocessor is:

       does not touch the file unless new items are added, thus can avoid remaking unless truly necessary (see make(1)).

WARNINGS

       If a string is a suffix of another string in the data base, but the shorter string is seen first by both strings are  placed  in  the  data
       base, when placing only the longer one there would be sufficient.

AUTHOR

       was developed by the University of California, Berkeley.

FILES

       Data base of strings
       Massaged C source
       C source for definition of array
       Temp file when `xstr name' does not touch

SEE ALSO

       mkstr(1).

																	   xstr(1)

10 More Discussions You Might Find Interesting

1. Programming

a problem about malloc()

Discussion started by: chenhao_no1

2. Programming

malloc

Discussion started by: rajashekaran

3. Programming

malloc()

Discussion started by: rash123

4. Programming

Malloc implementation in C

Discussion started by: Gambit_b