“在此范围内未声明，并且在实例化点依赖于参数的查找中没有发现任何声明”

I'm beginning a program using heaps in which I must insertSort, mergeSort, and quickSort into the heap. I was instructed to use the code from my textbook as a basis and I cannot even get the example code to compile. I keep receiving the error:I'm beginning a program using heaps in which I