int a=sizeof(int);

עיבצמ = (עיבצמ גוס) malloc (םיתבב ןורכיזה לדוג);

int *arr;
arr=(int *) malloc (10*sizeof(int));

void main()
  {
     int n,i,*arr;
     scanf( "%d" ,&n);
     arr = (int *) malloc(n*sizeof(int));
     if (arr==NULL)
     {
       printf("Allocation error\n");
       exit(1);
     }
     for (i=0; i<n ; i++)
        scanf("%d",&arr[i]);
     free (arr); 
 }

int *arr;
arr = (int *) malloc (10*sizeof(int));
if (arr==NULL)
{
  printf("Allocation error\n");
  exit (1);
}

free (הצקומ קולב תליחתל עיבצמ םש);

int *arr;
arr=(int *) malloc (10*sizeof(int));
.
.
.
free(arr);

עיבצמ = (עיבצמ גוס) realloc (עיבצמ ,שדח םיתב רפסמ);

void main()
{
  int grades[]={37,68,90,54,77,82,74,45,40,100},i;
  int *fail=NULL,num_failed=0;
  for (i=0; i<10; i++)
    if (grades[i]<55)
    {
      fail=(int *) realloc(fail, ++num_failed);  // שדחמ האצקה
      if (fail==NULL)
      {
        printf("Allocation error\n");
        exit(1);
      }  
      fail[num_failed-1]=grades[i];
    }

  for (i=0; i<num_failed; i++)
    printf("%d ",fail[i]);

  if (fail)
    free(fail); 
}

fail[num_failed-1]=grades[i]

char *p;
p=new char;

char *p;
p=new char[10];

delete p;

delete []p;