Question

Write a class named Car that has the following fields: • yearModel: The yearModel field is an int that holds the car's year model. • make: The make field is a String object that holds the make of the car. • speed: The speed field is an int that holds the car's current speed. In addition, the class should have the following methods: • Constructor: The constructor should accept the car's year model and make as arguments. These values should be assigned to the object's yearModel and make fields. The constructor should also assign 0 to the speed field. • Accessor: The appropriate accessor methods should be implemented to access the values stored in the object's yearModel, make, and speed fields. • accelerate: The accelerate method should add 5 to the speed field when it is called. • brake: The brake method should subtract 5 from the speed field each time it is called. Demonstrate the class in a program that contains a Car object, and then calls the accelerate method five times. After each call to the accelerate method, get the current speed of the car and print it on a separate line. Then, call the brake method five times, each time printing the current speed of the car on a separate line.

Answer 1

#include<iostream>
using namespace std;

class Car{
        
        // Creating the variables in private
        private:
                // year
                int yearModel;
                
                // Manufacturer
            string make;
            
                //current speed
            int speed;
            
        // Creating public functions so that private varibles are
        // indirectly accessible
        public:
                
                // parameterized constructor with year and make
                // and sets those variables to class variables and sets speed = 0
                Car(int year, string make){
                        yearModel = year;
                        make = make;
                        speed = 0;
                }
                
                // returns the year 
                int getYear(){
                        return yearModel;
                }
                
                // returns the make
                string getMake(){
                        return make;
                }
                
                // returns current Speed
                int getSpeed(){
                        return speed;
                }
                
                // increases speed by 5 units
                void accelerate(){
                        speed += 5;
                }
                
                // decreases speed by 5 units
                void brake(){
                        
                        // speed should not be negetive 
                        // so no action should be performed at this time
                        if( speed - 5 < 0 )
                                return;
                                
                        // speed is reduces by 5 units
                        speed -= 5;
                }
                
};
int main(){
        
        // initializing the constructor
        Car car(2020, "BMW");
        
        // calling accellerate function 5 times
        for(int i=1;i<=5;i++){
                
                // accelerating car
                car.accelerate();
                // printing current speed
                cout << "Accelerating, Current Speed = "<<car.getSpeed() <<endl;
        }
        cout <<endl;
        
        // calling brakes function 5 times
        for(int i=1;i<=5;i++){
                
                // Applying brakes
                car.brake();
                cout << "Applying Breaks, Current Speed = "<<car.getSpeed() <<endl;
        }
        
        return 1;
}