C malloc

Malloc in c

#include <stdlib.h>

void *malloc(size_t size);

void exemple(void)
{
  char *string;
  
  string = malloc(sizeof(char) * 5);
  if (string == NULL)
    return;
  string[0] = 'H';
  string[1] = 'e';
  string[2] = 'y';
  string[3] = '!';
  string[4] = '\0';
  printf("%s\n", string);
  free(string);
}

/// output : "Hey!"

C malloc

#include <stdlib.h>
int main(){
int *ptr;
ptr = malloc(15 * sizeof(*ptr)); /* a block of 15 integers */
    if (ptr != NULL) {
      *(ptr + 5) = 480; /* assign 480 to sixth integer */
      printf("Value of the 6th integer is %d",*(ptr + 5));
    }
}

Source: guru99.com

C malloc

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

Source: guru99.com

C malloc

ptr = (cast_type *) malloc (byte_size);

Source: guru99.com

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.

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;

Similar codes

18 votes428 views2 answers
C concatenate and allocate string
C
0 vote439 views1 answer
C question mark
C
0 vote393 views1 answer
Which library include size_t in C
C
0 vote423 views1 answer
Adding items to the beginning of a linked list
C
183 votes589 views6 answers
Create new branch git
C
0 vote410 views1 answer
Wireshark tls client hello filter
C
0 vote383 views2 answers
Declare variables arduino
C
1 vote429 views1 answer
Connect servo to arduino
C
1 vote393 views1 answer
Select first row first column pyspark
C
0 vote428 views1 answer
Version of libgcc
C