Thread: malloc(); and free();

  1. #1
    Registered User
    Join Date
    Sep 2002

    malloc(); and free();

    What do malloc(); and free(); do?

    What are they used for? Could somebody please show me an example?

    Also, what header files do i include to use these functions?

    I use MSVC++ 6!


  2. #2
    Me want cookie! Monster's Avatar
    Join Date
    Dec 2001
    malloc is used for dynamic memory allocation, free is used to free the memory allocated by malloc (or calloc, realloc)

    read the manual pages for more information

    #include <stdio.h>
    #include <stdlib.h> /* needed for malloc, free */
    int main(void)
       char *msg;
       msg = malloc(13); /* allocate memory (13 bytes) */
       if(msg == NULL)
          return -1;
       strcpy(msg, "Hello world!");
       printf("%s\n", msg);
       return 0;

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