String Generator

Hello, for awhile now I've been trying to make a "string generator" that is, something similar to something that might be used in a hash bruteforcer or something. Well, of course I thought it would be logical to take up the string permutations challenge, but how then would I allow it to make all combinations of a selected character set with a selected size.

Well, being the noob that I am I gvae up and started translating a PHP one back into C++ for whatever reason. But, now I just seem to be encountering problems, mainly with the use of the position [] array I believe. I would try to follow the logic of the program through on pen and paper, but I really couldn't get my head around the logic for this program.

How about I just give you the code and mark what I'm being stupid on:

test.cpp

Code:

#include "test.h"
BruteForce::BruteForce() 
{
	//Initialize variables
	wordLength =   0;
	charNumber =   0;
	maxNumber =    0;
	depth =        0;
	characters =   new char[27];
	
	//Fill up the array
	for(char i = 'A'; i <= 'Z'; i++) 
		characters[i - 'A'] = i;
	
}
BruteForce::BruteForce(int len, char* set) 
{
	//Initialize variables, sorry for C/C++ raping	
	wordLength = len;
	depth = 0;
	memset(word, 0, len);
	characters = new char[len + 1];
	characters = set;
	charNumber = strlen(characters);
	maxNumber = pow(charNumber, len);

	//I don't even understand position []
	//So I'm giving it a lot of space to work with
	//Set it all to zero. Bad n3wb technque
	for(int i = 0; i <= 1000; i++) 
		position[i] = 0;
}

char * BruteForce::getNext() 
{
	//Should be something here to tell it to stop
	//By checking position[0] against wordLength?


	position[0]++;
	depth = 0;
	getWord();
	return word;
}
BOOL BruteForce::getWord() {
	int result = true;
	if(depth < wordLength) 
	{
		result = false;
		depth++;


		//Basically I'm not getting my head around what
		//position[depth] should look like. 
		sprintf(word, "%s%c", word, characters[position[depth]]); 
		if(getWord()) 
		{
			position[depth]++;
			if(position[depth] == charNumber) 
			{
				position[depth] = 0;
				result = true;
			}
		}
		depth--;
	}
	return result;
}

int main() {
	BruteForce* bruteForce = new BruteForce(3, "aaa");
	//Yes, should stop somewhere, not jsut while(1)
	while(1) { printf("%s\n", bruteForce->getNext()); }

	return 0;
}

test.h

Code:

#include <windows.h>
#include <stdio.h>
#include <math.h>
#include <malloc.h>
class BruteForce { 

public: 
	char* getNext();
	BOOL  getWord();
	BruteForce();
	BruteForce(int len, char* set);
    
private: 
	int wordLength;
	char word[5]; //I don't really know
	int position[1000]; //I don't really know
	int charNumber;
	double maxNumber;
	int depth;
	char* characters; 
};

But anyways, the output seems "almost good" but not really, there's a clear attempt to make something though

aaa
aaaaaa
aaaaaaaaa
aaaaaaaabaa
aaaaaaaacaaaaM
aaaaaaaadaaaaMai
*Crash*

There's some clear attempt to do an abcd in column, what, column 9 of that for some reason. I'm just having a lot of trouble making a flow chart for my project, any help is appreciated. Sorry if maybe this looks like homework or if I'm dumping a big load on you. For some reason it's been my goal for awhile to make some sort of hash brute-forcer not for any malicious reasons at all just because it feels like a fun experience.

Well it seems overly complicated to me

Code:

#include <stdio.h>
void next ( char *test, int len ) {
  while ( --len >= 0 ) {
    if ( ++test[len] <= 'z' ) break;
    else test[len] = 'a';
  }
}
int main ( void ) {
  char test[] = "aaaa";
  while ( test[0] <= 'z' ) {
    printf( "%s\n", test );
    next( test, 4 );
  }
  return 0;
}

Yes, this does loop forever - fixing it is an easy exercise for the reader