C++ selection pointer

If you're referring to a "selection pointer" in C++, it's not a standard term or concept in the C++ language. However, I can provide information on pointers and how they can be used for selection or referencing purposes.

In C++, a pointer is a variable that holds the memory address of another variable. It allows you to indirectly access and manipulate the value of that variable through the pointer.

Here's a basic example to illustrate how pointers can be used for selection:

cppCopy code
#include <iostream>



int main() {

    int num1 = 10;

    int num2 = 20;

    int* selected = nullptr;  // Pointer to int, initially set to null



    int choice;

    std::cout << "Enter 1 for num1 or 2 for num2: ";

    std::cin >> choice;



    if (choice == 1) {

        selected = &num1;  // Assign the address of num1 to selected

    } else if (choice == 2) {

        selected = &num2;  // Assign the address of num2 to selected

    } else {

        std::cout << "Invalid choice." << std::endl;

        return 0;

    }



    std::cout << "Selected value: " << *selected << std::endl;  // Dereference the pointer to get the value



    return 0;

}

In this example, the program prompts the user to select either num1 or num2. Based on the user's choice, the program assigns the address of the selected variable to the pointer selected. By dereferencing the pointer with *selected, we can access the value of the selected variable.

Note that this is just a basic example to demonstrate the concept of pointers and selection. In practice, the use of pointers can vary depending on the specific requirements and design of your program.