我正在对从文件中读取的2000个整数进行快速排序,但是我得到的比较和交换次数似乎很高。我的柜台在正确的位置吗?还是排序有问题?
public int partition(int array[], int low, int high)
{
int pivot = array[high];
int i = (low-1);
for (int j = low; j < high; j++)
{
compCounter++;
if (array[j] <= pivot)
{
i++;
int temp = array[i];
array[i] = array[j];
array[j] = temp;
SwapCounter++;
}
}
int temp = array[i+1];
array[i+1] = array[high];
array[high] = temp;
SwapCounter++;
return i+1;
}
public void quickSort(int array[], int low, int high)
{
if (low < high)
{
int pivotPoint = partition(array, low, high);
quickSort(array, low, pivotPoint-1);
quickSort(array, pivotPoint+1, high);
}
}
答案 0 :(得分:1)
您的计数器是正确的。
一个简短的建议-将交换代码移到一个单独的函数swap(array,fromIndex,toIndex)