A Check digit check is used when an extra digit is added to a coded field to make sure it the entered data is correct (like social security numbers).
The <span> file that is used to determine which tty devices the root user is allowed to log in to is: </span><span>/etc/<span>securetty
</span></span>etc/securetty<span> is consulted by pam_securetty module in order to decide from which virtual terminals root is allowed to login from. You can limit the access to root account by </span>disabling root logins at the console by editing the /etc/securetty<span> file. </span>
In the C programming language, you can't determine the array size from the parameter, so you have to pass it in as an extra parameter. The solution could be:
#include <stdio.h>
void swaparrayends(int arr[], int nrElements)
{
int temp = arr[0];
arr[0] = arr[nrElements - 1];
arr[nrElements - 1] = temp;
}
void main()
{
int i;
int myArray[] = { 1,2,3,4,5 };
int nrElements = sizeof(myArray) / sizeof(myArray[0]);
swaparrayends(myArray, nrElements);
for (i = 0; i < nrElements; i++)
{
printf("%d ", myArray[i]);
}
getchar();
}
In higher languages like C# it becomes much simpler:
static void Main(string[] args)
{
int[] myArray = {1, 2, 3, 4, 5};
swaparrayends(myArray);
foreach (var el in myArray)
{
Console.Write(el + " ");
}
Console.ReadLine();
}
static void swaparrayends(int[] arr)
{
int temp = arr[0];
arr[0] = arr.Last();
arr[arr.Length - 1] = temp;
}
Answer:
Cell Phone, ATM Cash Machine, and a GPS Mapping Device
Answer:
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