c - 如何在 Visual Studio 2013 中修复 "differs in level of indirection"

Question

我的项目头目录中有两个头文件，分别是list.h和list-interface.h，其中包含数据类型的声明和函数的声明分别针对该数据类型。

//list.h   

typedef struct Container{
       int item;
       struct Container *next;
}node;

//list-interface.h

 node *first(node *);
 ......
  //some other declarations.

Then in the resource directory i have list-methods.c.   

//list-=methods.c  

 int is_last(node *lis_ptr, node *nod_ptr)
 {
    int islast = 0;
    if (nod_ptr == last(lis_ptr))
    islast = 1;
    return islast;
 }

 //returns 1 if the second argumented pointer points to the first element of the list,pointed by first argumented pointer.other wise 0.

 int is_first(node *lis_ptr, node *nod_ptr){
      int isfirst = 0;
      if (nod_ptr == first(lis_ptr))
          isfirst = 1;
      return isfirst;
  }

  //accessor methods------------------------------

  //returns the pionter to first element in the list.

  node* first(node *lis_ptr)
  {
      return lis_ptr;
  }

  //returns the pointer to last element in the list.

  node *last(node *lis_ptr)
  {
      while (lis_ptr->next != NULL)
      lis_ptr = lis_ptr->next;
      return lis_ptr;
  }


//This returns the pointer to the previous element to the node pointed by nod_ptr (second argument) in the list.

 node *before(node *first_ptr, node *nod_ptr)
 {

     if (first_ptr == nod_ptr){
        return NULL;
     }
     else{
        while (first_ptr->next != nod_ptr)
        first_ptr = first_ptr->next;
     }

    return first_ptr;

 }

但是当我在 Visual Studio 2013 中编译 list-methods.c 的代码时，出现以下错误

node*(node *) differs in level of indirection from int().

请给我一些解决方案。

Answer 1

为了阐明 @BLUEPIXY 和上一个问题的意思:如果您在声明函数或其原型(prototype)之前调用像 node* first() 这样的函数，编译器会假设它会是一个返回int的函数。确保您已启用所有编译器警告并处理每一个警告。