C简单实现动态2维数组

引用　：

在VS2008编译有问题，下面测试是OK的

#include
#include "form.h"

#include
#include
#include

void **darray_new(int row, int col, int size)
{ 
 void **arr;

 arr = (void **) malloc(sizeof(void *) * row + size * row * col);
 if (arr != NULL)
 {
  void *head;

  head = (void *)(arr + sizeof(void *) * row);
  memset(arr, 0, sizeof(void *) * row + size * row * col);
  while (row--)  
   arr[row] =  (unsigned char*)head + size * row * col;  
 }
 return arr;
}

void darray_free(void **arr)
{
 if (arr != NULL)
  free(arr); 
}
struct student
{
 char name[128];
 int pid;
};

//struct xxx **x;
//x = (struct xxx **) darray_new(5, 4, sizeof(struct xxx));

int main(int argc, char **argv)
{
 struct student **sd;
 sd = (struct student **) darray_new(5, 4, sizeof(struct student));
 strcpy(sd[1][3].name,"ass");
 sd[1][3].pid = 100;
 strcpy(sd[1][4].name,"ccccc");
 sd[1][4].pid = 101;
 
 char *pStr = "master";
 int f = 12345;
 int *n = &f;
 qDebug() << "char = " << pStr + 1 << "int = " << *(n+1);
 darray_free(sd);

 QApplication app(argc, argv);
 Form form;
 form.show();
 return app.exec();
}