malloc in c
// Use malloc to allocate memory
ptr = (castType*) malloc(size);
int *exampl = (int*) malloc(sizeof(int));
// Use calloc to allocate and inizialize n contiguous blocks of memory
ptr = (castType*) calloc(n, size);
char *exampl = (char*) calloc(20, sizeof(char));
4
6
#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!"
Thank you!
6
4
(6 Votes)
0
3.75
4
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;
}
Thank you!
4
3.75
(4 Votes)
0
3.75
8
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] = '\0';
printf("%s\n", string);
}
return 0;
Thank you!
8
3.75
(8 Votes)
0
4.2
5
// 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;
Thank you!
5
4.2
(5 Votes)
0
Are there any code examples left?
New code examples in category Other
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