c語言一維數組冒泡排序怎么輸出中間過程？

#include<iostream>

using namespace std;

void bubbleSort(int *arr,int len)

{

for (int i = 0; i < len - 1; i++)

{

for (int j = 0; j < len - i - 1; j++)

{

if (arr[j] > arr[j + 1])

{

int temp = arr[j];

arr[j] = arr[j + 1];

arr[j + 1] = temp;

}

}

for (int k = 0; k < len; k++)

{

if (k == 0)

{

cout << arr[k] ;

}

else

{

cout <<" "<< arr[k];

}

}

cout << endl;

}

}

int main()

{

int len = 0;

cin >> len;

int *arr = new int[len];

if (len == 1)

{

cin >> arr[0];

cout << arr[0];

}

else

{

for (int i = 0; i < len; i++)

{

cin >> arr[i];

}

bubbleSort(arr, len);

}

}