将空指针转换为整数指针

如何解决将空指针转换为整数指针

#include <stdio.h>
#include <signal.h>
#include <fcntl.h>
#include <string.h>

// fun() increments each element of the array a[] by 1.
void fun(void *ptr,int size)
{
  // -The problem is we cannot dereference a float pointer to get integer values.
  // We have to convert the float pointer to an integer pointer.
  int *iptr = (int *)ptr;
  for(int i = 0; i < size; i++)
  {
    iptr[i]++;
  }
}

int main() 
{
  int a[5] = {10,2,3,14,51};
  // Pass this array to the fun() function.
  // a is a pointer to the address of the first element of the array.
  
  printf("a = %p,*a = %d\n",a,*a); // a prints the address of the first element of the array a,and *a 
  prints the value of the first element of the array a.
  
  fun((void *)a,5); // a is an integer pointer
  // The problem is we need to convert a to a float pointer because that is the argument type in the 
  fun() function.

  for(int i = 0; i < 5; i++)
  {
    printf("%d\n",a[i]);
  }
return 0;
}

我的问题是我们不是在 fun 函数中将 void 指针“void *ptr”转换为整数指针吗？

如果答案是肯定的，那么我应该更改“我们不能取消引用浮点指针以获取整数值”的注释。它应该是“我们不能取消引用一个空指针来获取整数值”。请让我知道这个问题的正确答案是什么。谢谢！