how to make a pointer point to a the last value in an array

To make a pointer point to the last value in an array in C++, you can follow these steps:

1. Declare an array: Start by declaring an array of a specific data type. For example, you can declare an integer array as follows:

int arr[] = {1, 2, 3, 4, 5};

1. Calculate the size of the array: Determine the size of the array using the sizeof operator. This will give you the total number of elements in the array.

int size = sizeof(arr) / sizeof(arr[0]);

1. Create a pointer variable: Declare a pointer variable of the same data type as the array. In this case, the array is of type int, so we declare an int* pointer.

int* ptr;

1. Assign the address of the last element: Set the pointer variable to point to the last element of the array. To do this, you can use the index size - 1 to access the last element, and then use the & operator to get its address.

ptr = &arr[size - 1];

Now, the pointer ptr is pointing to the last element of the array arr. You can use this pointer to perform operations on the last element, such as dereferencing it or modifying its value.

Here's the complete code snippet:

#include <iostream>

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    int size = sizeof(arr) / sizeof(arr[0]);

    int* ptr;
    ptr = &arr[size - 1];

    std::cout << "Value of the last element: " << *ptr << std::endl;

    return 0;
}

This code snippet demonstrates how to make a pointer point to the last value in an array and prints the value of the last element using the pointer.