#include <stdlib.h>
#include <stdio.h>
#include <string.h>

const int longueur = 4;
const char *charset[16]={"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"};

int main(void){
    char *chaine = malloc((longueur+1)*sizeof(char));
    /*C'est ici que l'on commence a s'amuser*/
    int position = 0;
    chaine="0000";
    int j;
        while(position < longueur)
        {
                for (j=1;j<16;j++) {
                chaine[position] = *charset[j];
                printf("%s\n", chaine);
                };
        position++;
        };
return(0);
}