#include using namespace std; #define myPrint(x) std::cout <> radius; cout << "Area :"<< endl; pointerAsArgs(&Pi, &radius, &radius); } void pointerAsArgs(const double* const ptrPi, const double* const ptrRadius, double* const ptrArea) { if (ptrPi && ptrRadius, ptrArea) { *ptrArea = (*ptrPi) * (*ptrRadius) * (*ptrRadius); cout << *ptrArea; } } void pointerDynamicMemory2() { cout << "How many integers do you wish to enter....... " << endl; int num = 0; cin >> num; int* ptr = new int[num]; cout << "Allocated for " << num << " intergers " << endl; for (int counter = 0; counter < num; ++counter) { cout << "Enter a number " << counter << ": " << endl; cin >> *(ptr + counter); } cout << "Displaying all numbers entered.........." << endl; for (int counter = 0; counter < num; ++counter) { cout << *(ptr++) << endl; } ptr -= num; delete[]ptr; } void pointerDynamicMemory1() { cout << "How much memory do you need......... " << endl; int num; cin >> num; int* myNums = new int[num]; cout << "Memory allocated at: 0x" << hex << myNums << endl; delete[] myNums; } void pointerDynamicMemory() { int* ptr = new int; cout<<"Enter your dog\'s age...."<> *ptr; cout << "Age *" << *ptr << " is stored at 0x" << hex << ptr << endl; delete ptr; } void pointerSameSize() { cout << "*********SIZE OF FUNDEMENTAL DATA TYPES**********************" << endl; cout << "sizeof(char) = " << sizeof(char) << endl; cout << "sizeof(int) = " << sizeof(int) << endl; cout << "sizeof(double) = " << sizeof(double) << endl; cout << "sizeof(long) = " << sizeof(long) << endl; cout << "*********SIZE OF POINTERS TO FUNDEMENTAL DATA TYPES**********************" << endl; cout << "sizeof(char*) = " << sizeof(char*) << endl; cout << "sizeof(int*) = " << sizeof(int*) << endl; cout << "sizeof(double*) = " << sizeof(double*) << endl; cout << "sizeof(long*) = " << sizeof(long*) << endl; } void pointerValueChange() { int dog = 30; cout << "intialized dog age = " << dog << endl; int* ptr = &dog; cout << "ptr points to dog" << endl; cout << "Enter an age for your dog: " << endl; cin >> *ptr; cout << "Input stored at 0x" << hex << ptr << endl; cout << "Interger do = " << *ptr << endl; } void pointerAccessValue() { int age = 30; int dog = 49; cout << "Interger age " << age << endl; cout << "Dog age " << dog << endl; int* ptr = &age; cout << "ptr points to age" << endl; cout << "ptr = 0x" << hex << ptr << endl; cout << "*ptr THE VALUE HELD AT THE MEMORY LOCATION FOR PTR WHICH POINTS TO THE MEMORY LOCATION FOR AGE IS: " << *ptr << endl; int* ptr1 = &dog; cout << "ptr points to dog" << endl; cout << "ptr = 0x" << hex << ptr << endl; cout << "*ptr THE VALUE HELD AT THE MEMORY LOCATION FOR PTR WHICH POINTS TO THE MEMORY LOCATION FOR AGE IS: " << *ptr << endl; } void pointerAssignment() { int age = 30; int* pointToInt = &age; cout << "pointToInt points to age now" << endl; cout << "pointToInt = 0x" << hex << pointToInt << endl; int dog = 43; pointToInt = &dog; cout << "pointToInt points to dog now " << endl; cout << "pointToInt = 0x" << hex << pointToInt << endl; } void pointerDeclaration() { int age = 30; int* pointToAnInt = &age; cout << "Integer age is at: 0x" << hex << pointToAnInt << endl; } void pointerSimple() { int age = 30; const double Pi = 3.1416; cout << "Integer age is located at: 0x" << &age << endl; cout << "Doubel Pi is located at: 0x" << &Pi << endl; } void pointerBool() { cout << "is is sunny?.....(y/n)"; char userInput = 'y'; cin >> userInput; bool* const isSunny = new bool; *isSunny = true; if (userInput == 'n') { *isSunny = false; } cout << "boolean flag sunny says: " << *isSunny << endl; delete isSunny; myPrint("Hello from pointer land"); }

pointers and reference operator!!! and more pointers