为什么每次运行时我的冒泡排序程序的输出都会改变？

Here is my code:

这是我的代码:

#include<stdio.h>
#include<cs50.h>

int main(void)
{
    int array[8] = {2, 5, 3, 1, 4, 6, 9, 7};

    for (int j = 0; j < 8; j++)
    {
        for (int i = 0; i < 8 ; i++)
        {
            if (array[i] > array[i + 1])
            {
                int temp = array[i];
                array[i] = array[i + 1];
                array[i + 1] = temp;
            }
        }   
    }

    for (int i = 0; i < 8; i++)
        printf("%i", array[i]);

    printf("\n");
}
#include<stdio.h>