heirdom

no-reply@allegro.cc (kosmitek) — Fri, 29 Dec 2006 22:35:43 +0000

I have more complex classes, but I shortened it in order to it was better to be visible, because problem concerns heirdom only.

When I tried compile it I saw:
"55 C:\Documents and Settings\windowsXP\Pulpit\BezNazwy1.cpp base `player' with only non-default constructor in class without a constructor "

So something is wrong with constructor - I lower marked the line of code which she be lighted as wrong.

PS. I know that we don't heirdom constructor

1 
2class player
3{
    private:
    int money;
    int health;
    int weapon;
    int power;
    
    
    public:
           player(int a, int b, int c, int d);
           
          
     int change_money(int x);
     int change_health(int x);
     
     
     int see_money();
     int see_health();
     
         
23};
24 
25 
26 
27 
28 
29 
30class monster
31{
    private:
    
    int money;
    int health;
    
    public:
    
           monster(int a, int b);
           
    
     int see_money();
     int see_health();
         
45};
46 
47 
48 
49 
50 
51class better_player : public player
52{           <------------------------ this line of code is lightened
53 
          
    
    public:
    void function()
    {
     }
60};
           
62 
63 

65 
66 
        player::player(int a, int b, int c, int d)
           {
                            money=a;
                            health=b;
                            
            }
            
            
            
           
     int player::change_money(int x)
     {
         money=money+x;
         
     }
     
     int player::change_health(int x)
     {
         health=health+x;
         
     }
     
        
        
     int player::see_money()
     {
         
         return money;
     }
     
     int player::see_health()
     {
         
         return health;
     }
     
        
    
              
106 
107monster::monster(int a, int b)
           {
                            
                            money=a;
                            health=b;
            }
113 
114int monster::see_money()
     {
         
         return money;
     }
     
        
121int monster::see_health()
     {
         
         return health;
     }

no-reply@allegro.cc (X-G) — Fri, 29 Dec 2006 22:38:47 +0000

GET A C++ BOOK ALREADY. It will tell you all these things! You can't have a class (in this case better_player) with no explicit constructors that's inherited from a class with no default constructors!

no-reply@allegro.cc (kentl) — Sat, 30 Dec 2006 00:18:28 +0000

You can download Thinking in C++, 2nd edition by Bruce Eckel for free. It might be a good read.

no-reply@allegro.cc (Richard Phipps) — Sat, 30 Dec 2006 00:20:11 +0000

Can you really think in a programming language? I don't mean imagining how to solve a programming issue or problem by thinking of the code, but thinking in general? Life, and all that..

no-reply@allegro.cc (Evert) — Sat, 30 Dec 2006 00:28:40 +0000

Quote:

heirdom

The google term is "inheritance"

no-reply@allegro.cc (kentl) — Sat, 30 Dec 2006 00:37:03 +0000

Quote:

Can you really think in a programming language? I don't mean imagining how to solve a programming issue or problem by thinking of the code, but thinking in general? Life, and all that..

Apparantly Bruce Eckel can. And we could as well if we read his book.

no-reply@allegro.cc (kosmitek) — Sat, 30 Dec 2006 01:00:36 +0000

I use: constructor: "player() {};"
and now it works !!

so now I have:

1class player
2{
    private:
    int money;
    int health;
    
    
    
    public:
          player() {};
           player(int a, int b);
           
          
     int change_money(int x);
     int change_health(int x);
     
     
     int see_money();
     int see_health();
     
         
22};

no-reply@allegro.cc (Steve Terry) — Sat, 30 Dec 2006 02:46:19 +0000

Gasp! Could it ... no no ... could it really be possible kosmitek did something on his own? I can't believe it. Well I guess you don't need our help now, good luck on your next MMORPG project. Oh and by the way the whole point of inheritance you defeated by the way you wrote your classes. Again they do nothing you couldn't do with fewer lines of code in a single class or with C.

Sorry for the sarcasm... but DAMN man!

1
2	class player
3	{
4	private:
5	int money;
6	int health;
7	int weapon;
8	int power;
9
10
11	public:
12	player(int a, int b, int c, int d);
13
14
15	int change_money(int x);
16	int change_health(int x);
17
18
19	int see_money();
20	int see_health();
21
22
23	};
24
25
26
27
28
29
30	class monster
31	{
32	private:
33
34	int money;
35	int health;
36
37	public:
38
39	monster(int a, int b);
40
41
42	int see_money();
43	int see_health();
44
45	};
46
47
48
49
50
51	class better_player : public player
52	{ <------------------------ this line of code is lightened
53
54
55
56	public:
57	void function()
58	{
59	}
60	};
61
62
63
64
65
66
67	player::player(int a, int b, int c, int d)
68	{
69	money=a;
70	health=b;
71
72	}
73
74
75
76
77	int player::change_money(int x)
78	{
79	money=money+x;
80
81	}
82
83	int player::change_health(int x)
84	{
85	health=health+x;
86
87	}
88
89
90
91	int player::see_money()
92	{
93
94	return money;
95	}
96
97	int player::see_health()
98	{
99
100	return health;
101	}
102
103
104
105
106
107	monster::monster(int a, int b)
108	{
109
110	money=a;
111	health=b;
112	}
113
114	int monster::see_money()
115	{
116
117	return money;
118	}
119
120
121	int monster::see_health()
122	{
123
124	return health;
125	}