调用 fread（） 函数时文件指针如何移动？[复制]

问：

//Libraries are called accordingly 
struct std    
{
int a;
char b;
}// a structure with 2 objects

void main()

{

std h[5]; // structure array with 5 elements
int rec_size; // Size of single record to be accessed from the file 
rec_size=sizeof(structure std); // stores the size in bytes

while (true) 
  {
     fread(&h,rec_size,2,fptr); //fptr is a file pointer to some file

    /*Assume that the file pointer(fptr)has covered the last two record 
      blocks and stored
      them in "h". Then the shouldn't the position pointer proceed to end of 
      file and the next statement "if(feof(fptr)" then becomes true to exit 
      the loop and in essence miss out on the processing of those last two 
      record blocks?*/

    if(feof(fptr)) 
     /* Here, if the fptr has reached the end of file after fread(), 
        then this should execute*/                           
      break;

   //else additional code to process the content stored in "h" 
  }
}

我的疑问是，当 fread（） 函数返回并且在下一个语句中 feof（） 检查 EOF 时，如果 fread（） 处理了文件中的最后两个记录块，feof（） 不应该返回 true 吗？有人可以完全解释其功能吗？