Point to Every Array Elements

In C++, you can use a pointer to point to every element of an array. Here's an example:

int arr[5] = {1, 2, 3, 4, 5};
int* ptr = arr; // pointer to the first element of the array

for(int i = 0; i < 5; i++) {
    cout << *ptr << " "; // print the value pointed to by ptr
    ptr++; // move the pointer to the next element of the array
}

// Output: 1 2 3 4 5

In this example, we declare an integer array arr of size 5 and initialize it with some values. We then declare a pointer ptr and initialize it to point to the first element of the array using the address-of operator (&). We then use a for loop to iterate over each element of the array and print the value pointed to by the pointer ptr. Finally, we increment the pointer ptr to point to the next element of the array.

Array name used as pointer

In C++, the name of an array is used as a pointer to the first element of the array. Here's an example:

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

cout << *arr << endl; // Output: 1

int* ptr = arr;

cout << *ptr << endl; // Output: 1

In this example, we declare an integer array arr of size 5 and initialize it with some values. We then use the dereference operator (*) to print the value pointed to by the array name arr, which is the first element of the array. We then declare a pointer ptr and initialize it to point to the first element of the array using the array name arr. We then use the dereference operator to print the value pointed to by the pointer ptr, which is also the first element of the array.

Note that when you use the array name as a pointer, you cannot modify the value of the pointer. For example, the following code will give you a compilation error:

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

arr++; // Error: invalid use of array with unspecified bounds

This is because the array name arr is a constant pointer to the first element of the array, and cannot be modified.