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how could i create random objects? and assign values to them?

devonrevenge (2435)
i am attempting a lighter version of the bunny challenge, first i just want lots of objects popping up with certain variables that may call functions or get called by functions.

or if you want to just point me in the right direction a clue would be just as helpful
Moschops (7244)
Create a vector of objects (empty).

Each time your random trigger happens, add an object to the end of the vector.

When a function needs to do something with one of them, choose a random number from zero to size-of-vector minus one and use that object.
devonrevenge (2435)
ibut how do i create that object to be added to the vector? plus need to review vectors i thinks, thanks though be back when i reviewed vectors
Last edited on
Moschops (7244)
Here is how to create an object of type someType.
someType anObject;

Here is how to add it to a vector
thevector.push_back(anObject);
devonrevenge (2435)
Hey wait... how will i generate an object randomly,by witch i mean, one that doesnt allready exist into existence
Last edited on
Moschops (7244)
Generate random number.
Look at the number.
If the number is one you have decided means to make an object, make an object.
devonrevenge (2435)
the thing i am finding hard is this

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class directors{
()director constructo n stuff..
}
 
void directionfunction();
main ()

{
directors polanski
directors quentin

directorfunction ()
getdirector stuff....
return 0;
}


void directorfunction
{
directors (name=randomnamegeneratingfunction())

}

void random namegeneratingfuntion ()
{
}


my problem is popping a name right there in front of class and having it become the object...maybie i dont know what i am doing :P
AbstractionAnon (6954)
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vector<directors>  all_directors;

//  Add your directors to the vector
all_directors.push_back (polanski);
all_directors.push_back (quentin);

// generate a random number i from 0 to all_directors.size()-1
directors rand_dir;
rand_dir = all_directors.at(i);


IMO, your class name should be singular since each instance holds one director.
devonrevenge (2435)
IT WORKS IT WORKS BWAAAHAHAHAHAHAAAAAAHAAA

thanks guys
devonrevenge (2435)
why have i got a crashwhen i run??

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#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>
#include <vector>

using namespace std;

class bunny
{
    public:

        bunny  (int x=5, int y=5): posx (x), posy (y) {} //declaring posx and posy
        void setname (string  x)
        {
            name = x;
        }
        int setposx (int x)
        {
            posx=x;
        }
        int setposy (int y)
        {
            posy=y;
        }
        int getposx ()
        {
            return posx;
        }
        int getposy ()
        {
            return posy;
        }
    string name;
    int posx;
    int posy;
    char bunicon;

    };



char z = '*';
char x = ' ';
char brdray [10] [10] = {  {z,z,z,z,z,z,z,z,z,z},
{z,x,x,x,x,x,x,x,x,z},
{z,x,x,x,x,x,x,x,x,z},
{z,x,x,x,x,x,x,x,x,z},
{z,x,x,x,x,x,x,x,x,z},
{z,x,x,x,x,x,x,x,x,z},
{z,x,x,x,x,x,x,x,x,z},
{z,x,x,x,x,x,x,x,x,z},
{z,x,x,x,x,x,x,x,x,z}, {z,z,z,z,z,z,z,z,z,z} };

int getrand ();
void getboard ();
string namelist ();
void createobj ();
//////////////////////////////////////////////////////////////////////////////
int main()
{
srand(time(0));
vector <bunny>bunnies;
createobj();
createobj();
createobj();

cout <<bunnies[1].name<<endl;

}

//////////////////////////////////////////////////////////////////////////////
string namelist ()
{
string namearray [18] = {"bon","fur","fluff","foof","bax","tig","uru","ira","esa","afe","ige","ifi","floof","tix","dar","vini","ter", "von"};

string none = namearray [getrand()%18];
string ntwo =namearray [getrand()*4%18];
string nthree=namearray [getrand()*7%18];
string fullname=none+ntwo+nthree;
return fullname;
}

void getboard ()
{
for (int a = 0;a<10;a++)
 {
     for (int b =0;b<10;b++)
        cout << brdray [a][b];
        cout<<endl;
 }
}

int getrand ()
{
return 1+(rand()%6);
}

int getposx (int x)
{
for (int a = 0;a<10;a++)
 {
     for (int b =0;b<10;b++)

 {
  brdray [a] [b];
  if (brdray[a] [b]);

}
}
}

void createobj ()
{
    vector <bunny>bunnies;
    bunny namelist() ;
    bunnies.push_back (namelist());


}
Moschops (7244)
cout <<bunnies[1].name<<endl;
Because bunnies is of size zero.

In your function createobj, you make a WHOLE NEW vector which you add the bunny to, and then when the function ends that new vector is destroyed. The one you made in main is untouched.
devonrevenge (2435)
daaaah! any ideas on it doing what iwant?
Moschops (7244)
Pass in the vector you want the function to change, by reference.
Lowest0ne (1536)
You're supposed to make a std::list (or your own list) of bunnies.

Edit: not very helpful...
Last edited on
devonrevenge (2435)
thanks guys...this reference thing is difficult to master...i have hit a wall in my learning..any advice for learning walls? alcohol? good answer.
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