二重指针内存分配

#include
#include

typedef struct scull_qset {
    void **data;
    struct scull_qset *next;
}scull_qset_t;

int main(int argc,char ** argv)
{
  scull_qset_t * ptr1 =(scull_qset_t *) malloc(sizeof(scull_qset_t));
  int qset= 1000;
  int num = 4000;

  /* alloc one scull_qset */
  ptr1->data = (void **)malloc(qset*sizeof(void *));
  int i;
  for(i=0;i  {
     ptr1->data[i] = (void *)malloc(num*sizeof(char));   
     ptr1->data[i] = "hello world!";  
  }
 
  /* another substitude method.*/
  /*
  void ** pdata ;
  for(pdata=ptr1->data,i=0;i  {
     *pdata = (void *)malloc(num*sizeof(char));  
     *pdata = "hello world!";
  }
  */
  return 0;  
}