PASSWORD GENERATOR

/**----------------------------------
Password Generator
           **- By Stillfelil --*
-------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <string>
#include <math.h>

using namespace std;

void genPsw(const char* file,double ideb,double iend,const char* carList,int szPW);

int main(){

const char* carList = "azertyuiopmlkjhgfdsqwxcvbnAZERTYUIOPMLKJHGFDSQWXCVBN0123456789";
int szPW = 2;
int szBuff = strlen(carList);
double L = pow(szBuff,szPW);
printf("%f = %d ^ %d\n",L,szBuff,szPW);

int nbrFiles = 10;

double dev = L / nbrFiles;
char res[30];
sprintf(res,"%.0f",dev); 
dev = atof(res);


for(double i=0;i<nbrFiles;i++)
{
  string fname("psw.txt");
  char sNum[10];
  sprintf(sNum,"%.0f",i);
  fname += sNum;
  double ideb = dev*i; 
  double iend = dev*(i+1);
  printf("deb:%f , end=%f ",dev,ideb,iend);
  genPsw(fname.c_str(),ideb,iend,carList,szPW);
}

return 0;
}

void genPsw(const char* file,double ideb,double iend,const char* carList,int szPW /*-- Taille du password --*/){

	FILE* File = fopen(file,"w");

	int szBuff = strlen(carList); /*-- Taille du tableau de caracteres --*/

	double L = pow(szBuff,szPW); /*-- Nombre de lignes de la matrice (Nombre de password a generer) --*/

	int* mat = new int[szPW]; /*- La matrice (le password a generer) -*/

	printf("Generation... ");
	for(double i=ideb; i< (iend<L?iend:L); i++)
	{
	   for(int j=0; j<szPW; j++)
	    {
	    mat[j] = int(i/pow(szBuff,j)) %szBuff;
	    unsigned long int num = mat[j];
	    /*printf("%d",mat[j]);*/
	    fprintf(File, "%c",carList[num]);
	    }
	   /*printf("\n");*/
	   fprintf(File,"\n");
	}
        printf("done !\n");
	fclose(File);
}