给一个整型数组中的数按从大到小连续编号，c语言

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

//先将数组从大到小排序
for (int i = 0; i < n - 1; i++) {
for (int j = i + 1; j < n; j++) {
if (arr[j] > arr[i]) {
int temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}
}

//打印排序后的数组并连续编号
for (int i = 0; i < n; i++) {
printf("%d:%d ", i + 1, arr[i]);
}