Write a copy assignment operator for CarCounter that assigns objToCopy.carCount to the new objects's carCount, then returns *thi

Answer:

This is the implementation of the copy assignment operator for CarCounter:

CarCounter& CarCounter::operator=(const CarCounter& objToCopy) {

carCount = objToCopy.carCount;

return *this;  }

The syntax for a copy assignment operator is:

ClassName& ClassName:: operator= ( ClassName& object_name)

In this code snippet, the class name is CarCounter, and the object being copied is objToCopy.

The assignment operator = is invoked to transfer objToCopy.carCount to the carCount of the new instance.

This operator is utilized when an initialized object receives a new value from another active object.

Then return *this returns a reference to the invoking object.

Explanation:

The complete program looks like this:

#include <iostream>  // for input/output functions

using namespace std;   // enables access to objects like cin cout

class CarCounter {  // defining the class

public:  // public member functions of CarCounter

CarCounter();  // constructor for CarCounter

CarCounter& operator=(const CarCounter& objToCopy);  // copy assignment operator for CarCounter

void SetCarCount(const int setVal) {  // method to set the car count value

carCount = setVal;  } // assigns setVal to carCount

int GetCarCount() const {  // method to access carCount

return carCount;  }  

private:  // private members of the class

int carCount;  };    // private data member of CarCounter

CarCounter::CarCounter() {  // constructor

carCount = 0;  // initializes carCount to zero in the constructor

return; }  

// FIXME implement copy assignment operator  

CarCounter& CarCounter::operator=(const CarCounter& objToCopy){

/* this copy assignment operator sets objToCopy.carCount to the new object's carCount, then returns *this */

carCount = objToCopy.carCount;

return *this;}  

int main() {  // start of the main() function

CarCounter frontParkingLot;  // creates CarCounter instance

CarCounter backParkingLot;   // creates another CarCounter instance

frontParkingLot.SetCarCount(12);  // sets the value of carCount in frontParkingLot to 12

backParkingLot = frontParkingLot;  // assigns frontParkingLot's value to backParkingLot

cout << "Cars counted: " << backParkingLot.GetCarCount();  // retrieves and prints the value of carCount using GetCarCount

return 0;  }

The program outputs:

Cars counted = 12