Question

So on this assignment... I have the main.cpp file, the fan.cpp file, and the fan.h file created and open in Dev C++. However, every time I try to compile I get a series of undefined reference to errors. Any advice is much appreciated!!!

(45 pts) Work Programming Exercise 9.2 (class Fan) in the textbook on page 367. Additional specifications: • Use separate header and implementation files. • The main program (not the functions) should display the values of Speed, On, and Radius after calling the functions. • The problem refers to accessor (get) and mutator (set) functions for all the data fields (Speed, On, and Radius). This means the following functions should be included: o getSpeed(); o getOn(); o getRadius(); o setSpeed); o setOn(); o setRadius(); • Run the program for the test case described in the textbook and add a 3rd fan object that uses the default values assigned by the constructor. The program should use the accessor functions to display Speed, On, and Radius for all 3 fan objects. Turn in printouts of: o The main function o The class implementation file o The class header file o The program output o The class diagram (UML diagram) - create this in Word or Excel

Answer 1

1. Create Fan.h header file with class declaration in it.

2. Create Fan.cpp implementation file with class definition in it.

3. Include Fan.h directive in main.cpp file.

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C++ Program:

File: Fan.h

class Fan
{
//Data Members
private:
int speed;
bool on;
float radius;
  
//Member functions
public:
//Setter methods
void setSpeed(int val);
void setOn(bool val);
void setRadius(float val);
  
//Getter methods
int getSpeed();
bool getOn();
float getRadius();
};

File: Fan.cpp

#include "Fan.h"

//Setter methods
void Fan::setSpeed(int val)
{
speed = val;
}
  
void Fan::setOn(bool val)
{
on = val;
}
  
void Fan::setRadius(float val)
{
radius = val;
}
  
//Getter methods
int Fan::getSpeed()
{
return speed;
}
  
bool Fan::getOn()
{
return on;
}
  
float Fan::getRadius()
{
return radius;
}

File: main.cpp

#include <iostream>
#include "Fan.h"

using namespace std;

int main(int argc, char **argv)
{
//Creating object
Fan f1;
  
//Setting values
f1.setSpeed(3);
f1.setOn(true);
f1.setRadius(3.5);
  
//Printing values
cout << "\n Speed: " << f1.getSpeed() << "\n On: " << f1.getOn() << "\n Radius: " << f1.getRadius() << "\n";
return 0;
}

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Sample Run:

A. C:\Windows\SYSTEM32\cmd.exe Speed: 3 On: 1 Radius: 3.5 Press any key to continue ...