C：下标值既不是数组也不是指针

Question

我正在为C类简介做一些家庭作业，在其中我们必须编写一个程序来读取文本文件中的输入，该文本文件包含来自酿酒厂的订单信息。 我已经写完了所有内容，但是当我运行它时，唯一可以正确打印的是“ Winery＃1：”，然后窗口错误了。 我试图在程序结尾打印出一个数组，以查看问题所在，然后出现一个错误，指出：

|54|error: subscripted value is neither array nor pointer|

我知道该错误意味着什么，尽管我不确定该如何纠正。 我相信我已经正确声明了我的数组之类，但是我仍然收到错误。 这是我的代码：

int main () {
  //Creates the file pointer and variables
  FILE *ifp;
  int index, index2, index3, index4;
  int wineries, num_bottles, orders, prices, sum_order, total_orders;

  //Opens the file to be read from.
  ifp = fopen ("wine.txt", "r");

  //Scans the first line of the file to find out how many wineries there are,
  //thus finding out how many times the loop must be repeated.
  fscanf(ifp, "%d", &wineries);

  //Begins the main loop which will have repititions equal to the number of wineries.
  for (index = 0; index < wineries; index ++) {
    //Prints the winery number
    printf("Winery #%d:\n", index + 1);

    //Scans the number of bottles at the aforementioned winery and
    //creates the array "prices" which is size "num_bottles."
    fscanf(ifp,"%d", num_bottles );
    int prices[num_bottles];

    //Scans the bottle prices into the array
    for (index2 = 0; index2 < num_bottles; index2++)
      fscanf(ifp, "%d", &prices[index2]);

    //Creates variable orders to scan line 4 into.
    fscanf(ifp, "%d", &orders);

    for(index3 = 0; index3 < orders; index3++){
      int sum_order = 0;

      for(index4 = 0; index4 < num_bottles; index4++)
        fscanf(ifp, "%d", &total_orders);

      sum_order += (prices[index4] * total_orders);
      printf("Order #%d: $%d\n", index3+1, sum_order);
    }
  }
  printf("%d", prices[index2]);
  fclose(ifp);
  return 0;
}

我查看了本网站上的其他一些答案，但似乎没有一个对我的问题有所帮助。 我下沉的感觉是答案正看着我，但是我是一个累了的业余编码员，我一直找不到。 提前致谢！

Answer 1

prices有两种：一种是在for循环内的数组，另一种是在循环外的int。 因此，当您尝试在最后打印int价格时， prices[num_bottles]不再存在。 显然，int价格不能用作prices[index2] 。

从for循环中取出价格并将其放在顶部。

Answer 2

更改

//Scans the number of bottles at the aforementioned winery and
//creates the array "prices" which is size "num_bottles."
fscanf(ifp,"%d", num_bottles );

至

//Scans the number of bottles at the aforementioned winery and
//creates the array "prices" which is size "num_bottles."
fscanf(ifp,"%d", &num_bottles );
//               ^