C++

Forum

 
Getting string variables from main into constructor/deconstructor

Tduck (67)
I've been messing about with constructors and deconstructors, and I'm quite certain it's possible but I am unsure of how, to send variables to a class constructor/deconstructor. I will also say that the program is far from complete, which is why there is no #include<cst.lib> /etcetera for the random ints I used in the program, and the reaosn there are five if() statements evaluating the randInt. The problem I have, and I've set the randInt to 1 for now, is that whenever that runs, outputting the (monster object name).monsterName is impossible within the constructor I used below. 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
 
#include<iostream>
#include<string>
using namespace std;

class monster
{
    public:
    monster()
    {
        cout << "A " << monsterName << " approaches!" << endl;
    } //On the above line I want the monsterName to be output, but it's blank.  
      //How can I let this constructor here know what the string should be?  
    ~monster()
    {
        cout << "The " << monsterName << " is destroyed!" << endl;
    }
    float health;
    float damage;
    int defense;
    int level;
    string monsterName;
    string monsterAttack;
};
class player
{
    public:
    int level;
    int classType;
    float damage;
    float health;
    int defense;
};

int main()
{
    player mainChar;
    mainChar.level = 1;
    cout << "Hello, welcome to Dungeons and Dragons!" << endl;
    cout << "Be ready to pick a class.  You can choose warrior, archer, or mage \nType 1 for warrior, 2 for archer, 3 for mage" << endl;
    cout << "Classtype:  " << endl;
    cin >> mainChar.classType;
    bool playingGame = true;
    while(playingGame == true)
    {
        if(mainChar.classType == 1)
        {
            mainChar.health = 30 * mainChar.level * 1.05;
            mainChar.damage = 15 * mainChar.level * .66;
            mainChar.defense = 10 * mainChar.level * .75;
        }
        if(mainChar.classType == 2)
        {
            mainChar.health = 15 * mainChar.level;
            mainChar.damage = 12 * mainChar.level * .77;
            mainChar.defense = 8 * mainChar.level * .5;
        }
        if(mainChar.classType == 3)
        {
            mainChar.health = 15 * mainChar.level * .9;
            mainChar.damage = 25 * mainChar.level * .80;
            mainChar.defense = 6 * mainChar.level * .5;
        }
        int monsterInt = 1;
        if(monsterInt == 1)
        {
            monster dragon;
            dragon.level = mainChar.level;
            dragon.health = 60 * dragon.level;
            dragon.damage = 5 * 1.1 * dragon.level;
            dragon.defense = 5 * 1.2 * dragon.level;
            dragon.monsterName = "Dragon";
            dragon.monsterAttack = "The dragon breathes fire!";
        }
        if(monsterInt == 2)
        {
            monster dragon;
            dragon.level = mainChar.level;
            dragon.health;
            dragon.damage;
            dragon.defense;
            dragon.monsterName = "Dragon";
            dragon.monsterAttack = "The dragon breathes fire!";
        }
        if(monsterInt == 3)
        {
            monster dragon;
            dragon.level = mainChar.level;
            dragon.health;
            dragon.damage;
            dragon.defense;
            dragon.monsterName = "Dragon";
            dragon.monsterAttack = "The dragon breathes fire!";
        }
        if(monsterInt == 4)
        {
            monster dragon;
            dragon.level = mainChar.level;
            dragon.health;
            dragon.damage;
            dragon.defense;
            dragon.monsterName = "Dragon";
            dragon.monsterAttack = "The dragon breathes fire!";            
        }
        if(monsterInt == 5)
        {
            monster dragon;
            dragon.level = mainChar.level;
            dragon.health;
            dragon.damage;
            dragon.defense;
            dragon.monsterName = "Dragon";
            dragon.monsterAttack = "The dragon breathes fire!";
        }
    }
}
Last edited on
Repeater (3046)
Constructors can take variables.

1
2
3
4
5
 
    monster(string input)
    {
        monsterName  = input;
        cout << "A " << monsterName << " approaches!" << endl;
    }


called as:

1
2
 
string inputName("beans");
monster a_new_monster(inputName);
Tduck (67)
But if you look in the main area, the if evaluation is what is intended to define the monster::monsterName, not user input; The monster is supposed to be random.
Repeater (3046)
What user input? Your code already contains the strings you want to use. You just need to pass them into the constructor.

1
2
3
4
5
6
7
8
9
10
 
      if(monsterInt == 5)
        {
            string randomName("Dragon");
            monster dragon(randomName);
            dragon.level = mainChar.level;
            dragon.health;
            dragon.damage;
            dragon.defense;
            dragon.monsterAttack = "The dragon breathes fire!";
        }
Last edited on
Tduck (67)
Nevermind I blanked and then realized you were telling me that the constructor could use string vars like functions can.
Topic archived. No new replies allowed.