malloc c
snippet in c
malloc in c
user3488
//malloc or "memory allocation" reserves a part of the memory
pointer = (cast-type*) malloc(byte-size)
//Example
ptr = (int*) malloc(100 * sizeof(int));
Since the size of int is 4 bytes, this statement will allocate 400 bytes
of memory. And, the pointer ptr holds the address of the first byte in
the allocated memory.malloc in c
user3081
#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!"malloc c
user4489
int main(int argc, char *argv[])
{
int* memoireAllouee = NULL;
memoireAllouee = malloc(sizeof(int));
if (memoireAllouee == NULL) // Si l'allocation a échoué
{
exit(0); // On arrête immédiatement le programme
}
// On peut continuer le programme normalement sinon
return 0;
}
Malloc
user9545
ptr = malloc(size); //You dont need to cast