condition in a nested for loop in C won't work

I am new to C and I'm practicing for-loops and pointers. In this exercise I try to write a function that sorts array elements. the first part of the code (where I input the elements) is working, but everything below gives me a hard time. I don't understand if the problem is in the if/else statements or anywhere else in the loop structure. also the last loop doesn't work (I just want it to iterate over the sorted array and print the elements, like I did before with it unsorted.

Hope I can get some help, and also if you see anything more that I should pay attention to...

Thanks a bunch.

I tried checking if the way I defined the loop was accurate, that I put all the right values and that the basic "idea" that I had for sorthing the array was ok.

void sort_array_elements()
{
int x, i, j, k, temp;
printf("\n input the number of elements to store in the array: ");
scanf_s("%d", &x);

int arrnum[30];
ptr_int = &x;
printf("input %d elements in the array: \n", x);
for (i = 0; i < x; i++)
{
    scanf_s("%d\n", &arrnum[i]);
}

printf("the elements in the array before sorting: \n");
for (i = 0; i < x; i++)
{
    printf("element %d: %d\n", i, arrnum[i]);
}


for (i = 0; i < x; i++)
{
    for (j = 1; j < x; j++)
    {
        if (arrnum[i] > arrnum[j])
        {
            temp = arrnum[i];
            arrnum[i] = arrnum[j];
            arrnum[j] = temp;


        }
        else if (arrnum[i] == arrnum[j])
        {
            for (k = arrnum[i + 1]; k < x; k++)
            {
                if (arrnum[k] != arrnum[j])
                {
                    temp = arrnum[k];
                    arrnum[k] = arrnum[j];
                    arrnum[j] = temp;
                    break;
                }
            }
        }


    }

}

printf("the elements in the array after sorting: \n");

for (i = 0; i < x; i++)
{
    printf("element %d: %d\n", i, arrnum[i]);
}

}