mcalloc

 malloc                <ALLOC.H>

 Allocates memory

 Declaration:

 void *malloc(size_t size);

 Remarks:

malloc allocates a block of size bytes from the memory heap. It allows a

program to allocate memory explicitly as it's needed, and in the exact

amounts needed.

The heap is used for dynamic allocation of variable-sized blocks of memory.

Many data structures, such as trees and lists, naturally employ heap memory

allocation.

 Return Value:

On success, malloc returns a pointer to

    the newly allocated block of memory.

On error (if not enough space exists for

    the new block), malloc returns null. The

    contents of the block are left unchanged.

If the argument size == 0, malloc returns

    null.

 Example:

 #include <stdio.h>

 #include <string.h>

 #include <alloc.h>

 #include <process.h>

 int main(void)

 {

    char *str;

    /* allocate memory for string */

    if ((str = (char *) malloc(10)) == NULL)

    {

       printf("Not enough memory to allocate buffer\n");

       exit(1);  /* terminate program if out of memory */

    }

    /* copy "Hello" into string */

    strcpy(str, "Hello");

    /* display string */

    printf("String is %s\n", str);

    /* free memory */

    free(str);

    return 0;

 }

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