DevX Home    Today's Headlines   Articles Archive   Tip Bank   Forums   

+ Reply to Thread
Results 1 to 5 of 5
  1. #1
    Join Date
    Nov 2009
    Location
    Corona Ca
    Posts
    2

    Question Just when I think I have it all figured out

    HTML Code:
    #include <iostream>
    #include <string>
    
    using namespace std;
    
    
    class plasmaPistolClass{
    private:
    	int ammo;	 
        int rateOfFire;			 
    	int destructivePower;	
    							
    public:
        bool safetyOn;			 
        int maxAmmo;			 
    
        void pressTrigger(void);	
        void load(int nmbrOfBolts);		  
        void setDestructivePower(int powerSetting);   
        int showDestructivePower(void);		  
        void setRateOfFire(int boltsPerTriggerPress);   
    	int showRateOfFire(void);	  
        int ammoRemaining(void);	
    
    plasmaPistolClass();
    plasmaPistolClass(int, int);
    };
    
    int main(void)
    {
    	plasmaPistolClass pistol1;  
        plasmaPistolClass pistol2(8,60);
    
    	cout << "Plasma Pistol 1 Destructive Power: " << pistol1.showDestructivePower() << endl;
    	cout << "Plasma Pistol 1 Ammo Remaining: " << pistol1.ammoRemaining() << endl;
    	cout << "Plasma Pistol 1 Rate of Fire: " << pistol1.showRateOfFire() << endl;
    	cout << "Firing Pistol 1!" << endl; 
    	pistol1.pressTrigger();
    	cout << pistol1.showRateOfFire(); 
        cout << endl; 
    	cout << "Firing Pistol 1!" << endl;
    	pistol1.pressTrigger();
    	cout << pistol1.showRateOfFire();
    	cout << endl;
    	cout << "Plasma Pistol 1 Ammo Remaining: " << pistol1.ammoRemaining() << endl;
    	cout << endl;
    
    	cout << "Plasma Pistol 2 Destructive Power: " << pistol2.showDestructivePower() << endl;
    	cout << "Plasma Pistol 2 Ammo Remaining: " << pistol2.ammoRemaining() << endl;
    	cout << "Plasma Pistol 2 Rate of Fire: " << pistol2.showRateOfFire() << endl;
    	cout << "Firing Pistol 2!" << endl; 
    	pistol2.pressTrigger();
    	cout << pistol2.showRateOfFire(); 
        cout << endl;
    	cout << "Firing Pistol 2!" << endl;
    	pistol2.pressTrigger();
    	cout << pistol2.showRateOfFire(); 
        cout << endl;
    	cout << "Plasma Pistol 2 Ammo Remaining: " << pistol2.ammoRemaining() << endl;
    	cout << "Reloading Plasma Pistol 2";
    	pistol2.load(10);
    	cout << endl;
    	cout << "Plasma Pistol 2 Ammo Remaining: " << pistol2.ammoRemaining() << endl;
    	cout << "Plasma Pistol 2 Destructive Power: " << pistol2.showDestructivePower() << endl;
    	pistol2.setDestructivePower(8);
    	cout << endl;
    	cout << "Plasma Pistol 2 Destructive Power: " << pistol2.showDestructivePower() << endl;
    	cout << "Setting Pistol 2 Rate Of Fire: ";
    	pistol2.setRateOfFire(3);
    
        system("pause");      
        return 0;
    }
    
    plasmaPistolClass::plasmaPistolClass(void)
    {
    
    }
    	
    plasmaPistolClass::plasmaPistolClass(int powerSettings, int allowedAmmo)
    {
    	
    	 ammo = 60;                                         
    	 rateOfFire = 3; 
    	 maxAmmo = 60; 
    	 destructivePower = 8;
    	 safetyOn = false;
    }
    
    void plasmaPistolClass::pressTrigger(void)
    {
    	if (! safetyOn && rateOfFire < ammo)  
        	  ammo -= rateOfFire;
    }  
    void plasmaPistolClass::load(int nmbrOfBolts)
    {
    	ammo += nmbrOfBolts;
    	if (ammo > maxAmmo)
    		ammo = maxAmmo;
    	
    }
    
    void plasmaPistolClass::setDestructivePower(int powerSetting)
    {
    	destructivePower = powerSetting;
    	if (powerSetting > 8)
    		destructivePower = 8;
    	else if (powerSetting < 1);
    		destructivePower = 1;
    }  
         
    int plasmaPistolClass::showDestructivePower(void)
    {
    	return destructivePower;
    }
    
    void plasmaPistolClass::setRateOfFire(int boltsPerTriggerPress)
    { 
    	rateOfFire = boltsPerTriggerPress;
    	if (boltsPerTriggerPress > 9)
    		boltsPerTriggerPress = 3;
    	else if (boltsPerTriggerPress < 3);
    		boltsPerTriggerPress = 3;
    }
    int plasmaPistolClass::showRateOfFire(void)
    {
    	return rateOfFire;
    }
    int plasmaPistolClass::ammoRemaining(void)
    {
    	return ammo;
    }
    

    Here is my code. Everything compiles right and runs but the output for my first gun is coming out -858993460. I am guessing because I left my default constructor empty. But what can I do to fix this without having to rewrite my whole code?

  2. #2
    Join Date
    Dec 2003
    Posts
    3,366
    I think you have the answer.... just make the constructor:

    plasmaPistolClass ()
    {
    ammo = 60;
    rateOfFire = 3;
    maxAmmo = 60;
    destructivePower = 8;
    safetyOn = false;
    }

    same as your constructor that has parameters (which, by the way, it does not seem to use???). IMO the default is this one, and you need to *use* your parameters in the other one to do something different (???).

  3. #3
    Join Date
    Nov 2003
    Posts
    4,118
    As jonnin said, you must initialize your object's data members in the constructor. Preferably, it's done by using a mem-init list:
    Code:
     class plasmaPistolClass{
    //...
    public:
    plasmaPistolClass():ammo (60),rateOfFire (3), maxAmmo(60),destructivePower (8), safetyOn (false) {}
    };
    Danny Kalev

  4. #4
    Join Date
    Nov 2009
    Location
    Corona Ca
    Posts
    2
    Ya I got that finally. Thank you. So how are you guys at arrays? JK

  5. #5
    Join Date
    Nov 2003
    Posts
    4,118
    Quote Originally Posted by LilProblems View Post
    Ya I got that finally. Thank you. So how are you guys at arrays? JK
    Doing well, I reckon:)
    Danny Kalev

Similar Threads

  1. Replies: 2
    Last Post: 01-03-2006, 10:30 AM
  2. Dont worry...figured it out.
    By Lithic in forum VB Classic
    Replies: 2
    Last Post: 02-26-2005, 08:14 PM
  3. I figured out my problem...
    By Justin Law in forum .NET
    Replies: 0
    Last Post: 10-02-2001, 08:29 PM
  4. Thanks...figured it out!!!
    By Brad Isaacs in forum Database
    Replies: 0
    Last Post: 05-28-2001, 06:24 PM
  5. Re: Resizing windows (never mind, figured it out)
    By Jason Kontkanen in forum VB Classic
    Replies: 1
    Last Post: 08-17-2000, 11:44 AM

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
HTML5 Development Center
 
 
FAQ
Latest Articles
Java
.NET
XML
Database
Enterprise
Questions? Contact us.
C++
Web Development
Wireless
Latest Tips
Open Source


Top DevX Stories

Easy Web Services with SQL Server 2005 HTTP Endpoints
JavaOne 2005: Java Platform Roadmap Focuses on Ease of Development, Sun Focuses on the "Free" in F.O.S.S.
Wed Yourself to UML with the Power of Associations
Microsoft to Add AJAX Capabilities to ASP.NET
IBM's Cloudscape Versus MySQL


Sponsored Links