Question

write a C++ program using classes, friend functions and overloaded operators.

Computer class: Design a computer class (Computer) that describes a computer object. A computer has the following properties:

• Amount of Ram in GB (examples: 8, 16), defaults to 8.

• Hard drive size in GB (examples: 500, 1000), defaults to 500.

• Speed in GHz (examples: 1.6, 2.4), defaults to 1.6.

• Type (laptop, desktop), defaults to "desktop"

  Provide the following functions for the class:

• A default constructor (constructor with no parameters) that initializes all the variables to their default values.

• A constructor with four parameters to initialize all four member variables.

• Getters(accessors) and setters(mutators) for all four member variables.

• Calculate the price using the following formulas:

  o Laptop: 600.00 + amount of ram in GB * 5.00 + Hard drive size * .15 + (speed in GHz - 1.6) * 200

  o Desktop: 400.00 + amount of ram in GB * 4.00 + Hard drive size in GB * .10 + (speed in GHz - 1.6) * 200

• Overload the << operator to output all properties of a computer.

• Overload the >> operator that reads all four properties of a computer.

• Overload the == operator test if two computers are the same (all properties must

  match)

• Overload the < operator that compares the prices of two computers.

  You don’t have to check for invalid values.
  Test the Computer class with the following main program.

int main()

{
     Computer comp; //use default constructor
     Computer comp1(16, 1000, 1.6, "Laptop");
     cout << comp << endl; //output defaults
     cout << endl;
     cout << comp1 << endl;
     cout << endl;

     comp1.setRam(32);
     comp1.setHd(2000);

     int compRam = comp1.getRam();
     cout << "The computer ram was changed to "

          << comp1.getRam() << endl;
     cout << "The computer hd was changed to "

<< comp1.getHd() << endl;
cout << "Updated info" << endl << endl;
cout << comp1 << endl;
cout << endl;
comp1.setType("Desktop");
cout << "Computer type was changed to Desktop" << endl; cout << comp1 << endl;

Computer comp2;
cout << "Enter specs of a computer (Ram, HD, Speed, Type)" << endl; cin >> comp2;
cout << comp2 << endl;
if (comp1 < comp2)
{

           cout << "Computer 2 is more expensive" << endl;
     }

     if (comp1 == comp2)

{
cout << "comp1 and comp2 have the same specifications" << endl;

}

return 0; }

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
_________________

#include <iostream>
using namespace std;

class Computer
{
private :
   int RAM;
   int hardDrive;
   double speed;
   string type;
  
  
public :  
Computer(int ram,int hardDrive,double s,string type)
{
   this->RAM=ram;
   this->hardDrive=hardDrive;
   this->speed=s;
   this->type=type;
   }
Computer()
{
   this->RAM=8;
   this->hardDrive=500;
   this->speed=1.6;
   this->type="desktop";
   }  
  
   void setRam(int ram)
   {
       this->RAM=ram;
   }
   int getRam()
   {
       return RAM;
   }  
   void setHd(int hd)
   {
       this->hardDrive=hd;
   }
   int getHd()
   {
       return hardDrive;
   }
   void setSpeed(double s)
   {
       this->speed=s;
   }
   double getSpeed()
   {
       return speed;
   }
   void setType(string type)
   {
       this->type=type;
   }
   string getType() const
   {
       return type;
   }
  
   double calculatePrice()
   {
       double price=0;
       if(type.compare("Desktop")==0)
       {
           price=600+RAM*5.00+hardDrive*0.15+(speed-1.6)*200;
       }
       else if(type.compare("Laptop"))
       {
           price=400+RAM*4.00+hardDrive*0.10+(speed-1.6)*200;
       }
       return price;
   }
   friend std::ostream& operator<<(std::ostream& dout, const Computer&);

friend std::istream& operator>>(std::istream& din, Computer&);
bool operator==(const Computer& c); // operator==()
bool operator<(Computer& c);
};

bool Computer::operator<(Computer& c)
{
   if(this->calculatePrice()<c.calculatePrice())
   return true;
   else
   return false;
}
   ostream& operator<<(std::ostream& dout, const Computer& c)
   {
           cout <<"Amount of Ram(in GB) :"<<c.RAM <<endl;
       cout <<"Hard Drive Size(in GB):"<<c.hardDrive<<endl;
       cout <<"Speed(in GHz) :"<<c.speed<<endl;
       cout <<"Type :"<<c.type<<endl;
return dout;

   }

istream& operator>>(std::istream& din, Computer& c)
{
   cout <<"Enter Amount of Ram(in GB) :";
       din>>c.RAM ;
       cout <<"Enter Hard Drive Size(in GB):";
       din>>c.hardDrive;
       cout <<"Enter Speed(in GHz) :";
       din>>c.speed;
       cout <<"Enter Type :";
       din>>c.type;
       return din;
   }
  
bool Computer::operator==(const Computer& c)
{
   if(this->RAM==c.RAM && this->hardDrive==c.hardDrive &&this->speed==c.speed && this->type.compare(c.getType())==0)
   return true;
   else
   return false;
}

int main(){
Computer comp; //use default constructor
Computer comp1(16, 1000, 1.6, "Laptop");
cout << comp << endl; //output defaults
cout << endl;
cout << comp1 << endl;
cout << endl;
comp1.setRam(32);
comp1.setHd(2000);
int compRam = comp1.getRam();
cout << "The computer ram was changed to "
<< comp1.getRam() << endl;
cout << "The computer hd was changed to "
<< comp1.getHd() << endl;
cout << "Updated info" << endl << endl;
cout << comp1 << endl;
cout << endl;
comp1.setType("Desktop");
cout << "Computer type was changed to Desktop" << endl; cout << comp1 << endl;

Computer comp2;
cout << "Enter specs of a computer (Ram, HD, Speed, Type)" << endl; cin >> comp2;
cout << comp2 << endl;
if (comp1 < comp2)
{

cout << "Computer 2 is more expensive" << endl;
}
if (comp1 == comp2)
{
cout << "comp1 and comp2 have the same specifications" << endl;

}
  
  
return 0;
  
}

____________________________

Output:

CAProgram Files (x86)\Dev-Cpp\MinGW64\bin\ComputerClassOperatorOverload Read WriteCompa.. Amount of Ram<in GB:8 Hard Drive Size<in GB):500 Speedin GHz> :1.6 Type desktop Amount of Ramin GB) :16 Hard Drive Sizein GB) 1000 Speed<in GHz :1.6 Type Laptop The computer ram was The computer hd was changed to 2000 Updated info changed to 32 Amount of Ram<in GB) :32 Hard Drive Sizein GB): 2000 Speed<in GHz :1.6 Type Laptop Computer type was Amount of Ram<in GB :32 Hard Drive Sizein GB) 2000 Speedin GHz 1.6 Type Desktop changed to Desktop Enter specs of a computer <Ram, HD, Speed, Type> Enter Amount of Ramin GB) :2 Enter Hard Drive Sizein GB) :500 Enter Speed<in GHz: 2.6 Enter Type :Laptop Amount of Ramin GB 2 Hard Drive Size<in GB):500 Speed<in GHz> :2.6 Type Laptop Process exited after 19.55 seconds with return value 0 Press any key to continue

_______________Could you plz rate me well.Thank You