c-resources/CPlusPlus20ForProgrammers-m.../examples/ch09/fig09_29/fig09_29.cpp

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// fig09_29.cpp
// Using the this pointer to refer to object members.
#include <fmt/format.h>
#include <iostream>
class Test {
public:
explicit Test(int value);
void print() const;
private:
int m_x{0};
};
// constructor
Test::Test(int value) : m_x{value} {} // initialize x to value
// print x using implicit then explicit this pointers;
// the parentheses around *this are required due to precedence
void Test::print() const {
// implicitly use the this pointer to access the member x
std::cout << fmt::format(" m_x = {}\n", m_x);
// explicitly use the this pointer and the arrow operator
// to access the member x
std::cout << fmt::format(" this->m_x = {}\n", this->m_x);
// explicitly use the dereferenced this pointer and
// the dot operator to access the member x
std::cout << fmt::format("(*this).m_x = {}\n", (*this).m_x);
}
int main() {
const Test testObject{12}; // instantiate and initialize testObject
testObject.print();
}
/**************************************************************************
* (C) Copyright 1992-2022 by Deitel & Associates, Inc. and *
* Pearson Education, Inc. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
**************************************************************************/