malloc calloc realloc free

malloc
#include

using namespace std;

int main()
{
int n;
printf("Enter size of array/n");
scanf("%d",&n);

int* A = (int*)malloc(n*sizeof(int));

for(int i = 0; i < n; i++) A[i] = i + 1; for(int i = 0; i < n; i++) printf("%d ",A[i]); return 0; }  calloc #include

using namespace std;

int main()
{
int n;
printf("Enter size of array/n");
scanf("%d",&n);

int* A = (int*)calloc(n, sizeof(int));//calloc 初始化初始值为0，而 malloc

malloc calloc realloc free最先出现在Python成神之路。