朋友类不工作c++，声明“类T”阴影模板参数。

I am working on a class to produce a templated Median Heap. I have two classes: a Median Heap (which holds a maxHeap and a minHeap object) , and a Heap object. I am trying to make the MedianHeap class a friend of the Heap class because I need to access the data members "maxHeap" and "minHeap" from the Heap class. These are the main errors I am getting and I've spent hours trying to figure out why:I am working on a class to produce a templated