/* Created by: Raul Sanchez Date: 08/16/2020 Using Pointers to display and change values */ #include using namespace std; // Global Variables int number = 50; int *pointer = &number; void useVariable() { // Title cout << ".....Using Variable......\n" ; // Display number cout << "Variable value: " << number; // Display address cout << "\nVariable address: " << &number; } void usePointer() { // Title cout << "\n\n.....Using Pointer.......\n"; // Display Value with Pointer cout << "Pointer value: " << *pointer; // Displays address with a pointer cout << "\nPointer Address: " << pointer; } void newPointer() { /* When you assign a new value afterwards like this, the num variable does assign a new value but has a different memory. num = 10; (Adress: 1234) num = 20; (Adress: 5678) To make sure we get to change the value and keep the same address we practice something called "Pass by reference". Which is to change the value inside the pointer. num2 = 10; (Adress 1234) int *pointer = &num2; pointer = 20; // New value, same address num2 = 20; (Adress 1234) */ // Title cout << "\n\nChange Value with Pointer\n"; // Changing value *pointer = 100; // Display value cout << "New Value: " << *pointer << endl; cout << "Same address: " << pointer; } int main() { // Calling functions useVariable(); usePointer(); newPointer(); return 0; }

Understanding Pointers