c++ - 如何在索引为空时停止遍历数组？

Question

如果我有一个大小为 MAX_SIZE 的数组，并且只占用了 20 个索引，您如何使它在 itemList[20] 之后停止打印 0？ (我正在从一个文本文件中读入)

const int MAX_SIZE = 1000;
item itemList[MAX_SIZE];

for(int i= 0; i<MAX_SIZE;i++)
{
itemList[i].Print(); //prints members in item

  if(i==19) // I used this just to see what I was printing properly
   {         //I know it is bad practice so I would like an alternative.
       break; //Also, it is only possible if you have access to the text file.
   }
}

Answer 1

您可以执行基本检查:

if(itemList[i].Function() == 0) break;