Answers for "use malloc in c"

malloc() in c and c++

/* malloc example: random string generator*/
#include <stdio.h>      /* printf, scanf, NULL */
#include <stdlib.h>     /* malloc, free, rand */

int main ()
{
  int i,n;
  char * buffer;

  printf ("How long do you want the string? ");
  scanf ("%d", &i);

  buffer = (char*) malloc (i+1);
  if (buffer==NULL) exit (1);

  for (n=0; n<i; n++)
    buffer[n]=rand()%26+'a';
  buffer[i]='';

  printf ("Random string: %sn",buffer);
  free (buffer);

  return 0;
}

malloc c include

<stdlib.h>

malloc in c

int main(int argc, char *argv[])
{
    int* string = NULL;

    memoireAllouee = malloc(sizeof(int));
    if (string == NULL) 
    {
    	return;
   		string[0] = 'H';
        string[1] = 'e';
        string[2] = 'y';
        string[3] = '!';
        string[4] = '';
        printf("%sn", string);
    }



    return 0;

what is the use of malloc in c

In C, the library function malloc is used to allocate a block of memory on the heap. The program accesses this block of memory via a pointer that malloc returns. When the memory is no longer needed, the pointer is passed to free which deallocates the memory so that it can be used for other purposes.

C malloc

Example: ptr = (int *) malloc (50)

malloc in c

// Let's allocate enough space on the heap for an array storing 4 ints

intArray = (int *) malloc(4 * sizeof(int)); // A pointer to an array of ints

intArray[0] = 10;
intArray[1] = 20;
intArray[2] = 25;
intArray[3] = 35;