冒泡排序为啥排序不成功

Question

#include <stdio.h>

void exp(int* ch,int len)
{

 for (int i = 0; i < len - 1; i++)
  {
       for (int j = 0; j < len - 1 - j; j++)
      {
         if (  *(ch + j) < *(ch + j + 1))
          {
           int temp = *(ch + j);
              *(ch + j) = *(ch + j +1);
           *(ch + j + 1) = temp;
          }
      }
  }

}

int main()
{

int arr[] = { 2,3,1,6,4,8,5,9,0,7 };
int len = sizeof(arr) / sizeof(arr[0]);

exp(arr,len);

for(int i=0;i<len;i++)
printf("%d ", * (arr + i));
return 0;

}

Answer 1

j < len - 1 - j
改成
j < len - 1 - i