Same as accessing the value at the memory address held by pointer by indirection, the indirection can also be used to manipulate variable's value. Assigning a value to a dereferenced pointer will indirectly change a value of a variable the pointer is pointing to. The following example illustrates simple manipulation of data with pointers:#include <iostream>int main(){ using namespace std;// Declare an integer variable and initialize it with 99 unsigned short int myInt = 99;// Declare and initialize a pointer unsigned short int * pMark = 0;// Print out a value of myInt cout << myInt << endl;// Use address-of operator & to assign memory address of myInt to a pointer pMark = &myInt;// Dereference a pMark pointer with dereference operator * and set new value *pMark = 11;// show indirectly a value of pMark and directly the value of myInt cout << "*pMark:\t" << *pMark << "\nmyInt:\t" << myInt << endl;return 0;}OUTPUT:99*pMark: 11myInt: 11Dereferencing a pMark pointer and assignment of new value to 11 will indirectly alter a value of myInt also to 11. It is important to bring up again that pointer holds only a variable's memory address not its value. To access a value of the variable to which a pointer is pointing to the pointer must be derefereced by dereference operator “ * “. Note “ * “ is not a multiplication, by the context of your C++ code your compiler will differentiate if your intention is to use multiplication or dereference operator. C++
Topic: Pointers
Explain about Manipulating Data with Pointers and example ?
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