Re: seeking an opinion from the collective wisdom here

From:
"Jim Langston" <tazmaster@rocketmail.com>
Newsgroups:
comp.lang.c++
Date:
Sat, 2 Jun 2007 17:52:48 -0700
Message-ID:
<Vho8i.32$hP4.19@newsfe05.lga>
"Devon Null" <theronnightstar@xgmailx.com> wrote in message
news:u62dnQouwuWVWfzbnZ2dnUVZ_uiknZ2d@comcast.com...

[edited to try and eliminate word wrapping in code]

I was simply wondering if this was a mal-formed class header:

#ifndef _items_h_
#define _items_h_

#include <iostream>
#include <string>
#include <vector>

using namespace std;

class Item
{
   public:
       Item( float weight = 0,\
             bool set_can_equip = false,\
             bool set_can_attack = false,\
             bool set_can_defend = false,\
             bool set_can_drink= false,\
             bool set_can_eat = false,\
             bool set_can_use = false,\
             bool set_is_consumable = false,\
             bool set_is_magical = false );
       //Below are the set and get functions for
       //all variables in this class

       void set_weight( float weight )
           { item_weight = weight; }
       float get_weight()
           { return item_weight; }

       void set_can_equip( bool set_can_equip )
           { can_equip = set_can_equip; }
       bool get_can_equip()
           { return can_equip; }

       void set_can_attack( bool set_can_attack )
           { can_attack = set_can_attack; }
       bool get_can_attack() { return can_attack; }

       void set_can_defend( bool set_can_defend )
           { can_defend = set_can_defend; }
       bool get_can_defend() { return can_defend; }

       void set_can_drink( bool set_can_drink )
           { can_drink = set_can_drink; }
       bool get_can_drink() { return can_drink; }

       void set_can_eat( bool set_can_eat )
           { can_eat = set_can_eat; }
       bool get_can_eat() { return can_eat; }

       void set_can_use( bool set_can_use )
           { can_use = set_can_use; }
       bool get_can_use() { return can_use; }

       void set_is_consumable( bool set_is_consumable )
           { is_consumable = set_is_consumable; }
       bool get_is_consumable() { return is_consumable; }

       void set_is_magical( bool set_is_magical )
           { is_magical = set_is_magical; }
       bool get_is_magical() { return is_magical; }

       void describe(); // simply returns description (see below)
       void clear_describe(); // clears description
       void add_describe( string line_to_add );
       /*Line above checks to see if description is set to either
         need_set or desc_cleared, and if so description.clear()
         then push_back( line_to_add ), else just
         push_back( line_to_add)*/

   private:
   // These are stats that will be set for every item created
       string need_set; // description is initialized with this
       string desc_cleared; // description will be set to this
                            //after it has been cleared
       vector<string> description;
       // This is to allow multi-line descriptions
       float item_weight; // These are pretty self explanatory I think
       bool can_equip;
       bool can_attack;
       bool can_defend;
       bool can_drink;
       bool can_eat;
       bool can_use;
       bool is_consumable;
       bool is_magical;
};

#endif

but as I read along I was confused over something. The above works just
fine, but I was also wondering should the constructor be this:

Item( float weight = 0,\
     bool set_can_equip = false,\
     bool set_can_attack = false,\
     bool set_can_defend = false,\
     bool set_can_drink = false,\
     bool set_can_eat = false,\
     bool set_can_use = false,\
     bool set_is_consumable = false,\
     bool set_is_magical = false );

with a constructor body like this in the cpp file:

Item::Item( float weight,\
           bool set_can_equip,\
           bool set_can_attack,\
           bool set_can_defend,\
           bool set_can_drink,\
           bool set_can_eat,\
           bool set_can_use )
{
   item_weight = weight;
   can_equip = set_can_equip;
   can_attack = set_can_attack;
   can_defend = set_can_defend;
   can_drink = set_can_drink;
   can_eat = set_can_eat;
   can_use = set_can_use;
   is_consumable = set_is_consumable;
   is_magical = set_is_magical;
   need_set = "You need to set a description here!\n";
   desc_cleared = "The description has been cleared.\n";
   description.clear();
   description.push_back( need_set );
}

or this:

Item() : float weight( 0 ),\
        bool can_equip( false ),\
        bool can_attack( false ),\
        bool can_defend( false ),\
        bool can_drink( false ),\
        bool can_eat( false ),\
        bool can_use( false ),\
        bool is_consumable( false ),\
        bool is_magical( false );

and lose the entire body of the constructor in the cpp file? I will need
to pass in parameters to override the defaults when I instantiate the
objects.

Question 1: Is this a mal-formed class header?
Question 2: Which should I use for the initialization list?


I would probably do it similar to this (notice also renaming of variables
and methods):

#ifndef ITEMS_HEADER_
#define ITEMS_HEADER_

#include <iostream>
#include <string>
#include <vector>

using namespace std;

class Item
{
public:
    Item( float weight = 0,
        bool set_can_equip = false,
        bool set_can_attack = false,
        bool set_can_defend = false,
        bool set_can_drink= false,
        bool set_can_eat = false,
        bool set_can_use = false,
        bool set_is_consumable = false,
        bool set_is_magical = false );
    //Below are the set and get functions for
    //all variables in this class

    void weight( float Weight )
        { weight_ = Weight; }
    float weight()
        { return weight_; }

    void equipable( bool Can_equip )
        { equipable_ = Can_equip; }
    bool equipable()
        { return equipable_; }

    void attackable( bool Can_attack )
        { attackable_ = Can_attack; }
    bool attackable()
        { return attackable_; }

    void defendable( bool Can_defend )
        { defendable_ = Can_defend; }
    bool defendable()
        { return defendable_; }

    void drinkable( bool Can_drink )
        { drinkable_ = Can_drink; }
    bool drinkable()
        { return drinkable_; }

    void eatable( bool Can_eat )
        { eatable_ = Can_eat; }
    bool eatable() { return eatable_; }

    void useable( bool Can_use )
        { useable_ = Can_use; }
    bool useable()
        { return useable_; }

    void consumable( bool Is_consumable )
        { consumable_ = Is_consumable; }
    bool consumable()
        { return consumable_; }

    void magical( bool Is_magical )
        { magical_ = Is_magical; }
    bool magical()
        { return magical_; }

    void describe(); // simply returns description (see below)
    void clear_describe(); // clears description
    void add_describe( string line_to_add );
    /*Line above checks to see if description is set to either
    need_set or desc_cleared, and if so description.clear()
    then push_back( line_to_add ), else just
    push_back( line_to_add)*/

private:
    // These are stats that will be set for every item created
    string need_set; // description is initialized with this
    string desc_cleared; // description will be set to this
    //after it has been cleared
    vector<string> description;
    // This is to allow multi-line descriptions
    float weight_; // These are pretty self explanatory I think
    bool equipable_;
    bool attackable_;
    bool defendable_;
    bool drinkable_;
    bool eatable_;
    bool useable_;
    bool consumable_;
    bool magical_;
};

#endif

Item::Item( float weight,
            bool equipable,
            bool attackable,
            bool defendable,
            bool drinkable,
            bool eatable,
            bool useable,
            bool consumable,
            bool magical ): weight_( weight ), equipable_( equipable ),
                attackable_( attackable ), defendable_( defendable ),
                drinkable_( drinkable ), eatable_( eatable ),
                useable_( useable ), consumable_( consumable ),
                magical_( magical )

{
    need_set = "You need to set a description here!\n";
    desc_cleared = "The description has been cleared.\n";
    description.clear();
    description.push_back( need_set );
}

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