In C++ the declaration of floating point variables starts with the type name double, followed by the name of the variable, and t
erminates with a semicolon. It is possible to declare multiple variables separated by commas in one statement. The following statements present examples, double b; double a, z, W; The following partial grammar represents the specification for C++ style variable declaration. In this grammar the range a-z indicates terminals that represent variable names. A variable name consists of only one letter. The non-terminal S is the start symbol. S = TV; V=C,VC T = float C = a-z We want to design an LR parser for this grammar. Create a complete parsing DFA, showing the closure for all states including the parsing marker in every rule, and transitions between the states. States need to be numbered or named. You may write all required information in a table instead of drawing a DFA.
1 answer:
Answer:
See explaination
Explanation:
Given a partial grammar which represents the specification for C++ style variable declaration. In this range a - z indicates terminals that represents the variable names.
'S' is the start symbol of the
non-terminal.
Hence, given,
S= TV
V= CX
Please kindly refer to attachment for further instructions and complete step by step solution.
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Answer:
Here is the copy assignment operator for CarCounter:
CarCounter& CarCounter::operator=(const CarCounter& objToCopy) {
carCount = objToCopy.carCount;
return *this; }
The syntax for copy assignment operator is:
ClassName& ClassName :: operator= ( ClassName& object_name)
In the above chunk of code class name Is CarCounter and object name is objToCopy.
Assignment operator = is called which assigns objToCopy.carCount to the new objects's carCount.
This operator basically is called when an object which is already initialized is assigned a new value from another current object.
Then return *this returns the reference to the calling object
Explanation:
The complete program is:
#include <iostream> //to use input output functions
using namespace std; //to access objects like cin cout
class CarCounter { //class name
public: // public member functions of class CarCounter
CarCounter(); //constructor of CarCounter
CarCounter& operator=(const CarCounter& objToCopy); //copy assignment operator for CarCounter
void SetCarCount(const int setVal) { //mutator method to set the car count value
carCount = setVal; } //set carCount so setVal
int GetCarCount() const { //accessor method to get carCount
return carCount; }
private: //private data member of class
int carCount; }; // private data field of CarCounter
CarCounter::CarCounter() { //constructor
carCount = 0; //intializes the value of carCount in constructor
return; }
// FIXME write copy assignment operator
CarCounter& CarCounter::operator=(const CarCounter& objToCopy){
/* copy assignment operator for CarCounter that assigns objToCopy.carCount to the new objects's carCount, then returns *this */
carCount = objToCopy.carCount;
return *this;}
int main() { //start of main() function
CarCounter frontParkingLot; // creates CarCounter object
CarCounter backParkingLot; // creates CarCounter object
frontParkingLot.SetCarCount(12); // calls SetCarCount method using object frontParkingLot to set the value of carCount to 12
backParkingLot = frontParkingLot; //assigns value of frontParkingLot to backParkingLot
cout << "Cars counted: " << backParkingLot.GetCarCount(); //calls accessor GetCarCount method to get the value of carCount and display it in output
return 0; }
The output of this program is:
Cars counted = 12
