在这段代码中我在哪里得到分段错误？

如何解决在这段代码中我在哪里得到分段错误？

    class Solution
{
    public:
    //Heapify function to maintain heap property.
    void heapify(int arr[],int n,int i)  
    {
      if(i<=0)return;
      int parent = i-1/2;
      if(arr[i] < arr[parent]){
          int temp = arr[i];
          arr[i] = arr[parent];
          arr[parent] = temp;
      }
      heapify(arr,n,parent);
      
    }

    public:
    //Function to build a Heap from array.
    void buildHeap(int arr[],int n)  
    { 
        for(int i=n/2-1;i>=0;i--){
            heapify(arr,i);
        }
        
    }

    
    public:
    //Function to sort an array using Heap Sort.
    void heapSort(int arr[],int n)
    {
        buildHeap(arr,n);
        
    }
};