Print maximum powers of b

#include <stdio.h>

int powers_recursive(int b, int l){
  if(l>0){
    for(int i=0; i<b-1; ++i){
      int p = powers_recursive(b, l-1);
      printf("%d", p);
    }
    powers_recursive(b,l-1);
    return l;
  }else{
    return 0;
  }
}

void powers_loop_goto(int b, int l){
  int reps[l];
  int p = l-1;
  reps[p] = b;
  while(p < l){
    while(reps[p] > 0){
      --reps[p--];
      if( p == -1 ) goto inc;
      reps[p] = b;
    }
    while(reps[p] == 0 && p < l)
inc:  ++p;
    
    printf("%d", p);
  }
}

void powers_loop(int b, int l){
  int reps[l+1];
  int p = l;
  reps[p] = b;
  while(p <= l){
    while(reps[p] > 0){
      --reps[p--];
      reps[p] = (p == 0) ? 0 : b;
    }
    while(reps[p] == 0 && p <= l)
      ++p;
    
    printf("%d", p-1);
  }
}

void powers_loop_break(int b, int l){
  int reps[l];
  int p = l-1;
  reps[p] = b;
  while(p < l){
    while(reps[p] > 0){
      --reps[p];
      if(p == 0) break;
      --p;
      reps[p] = b;
    }
    while(reps[p] == 0 && p < l)
      ++p;
    
    printf("%d", p);
  }
}

void powers_loop_slick(int b, int l){
  int reps[l];
  int p = l-1;
  reps[p] = b;
  while(p < l){
    while(reps[p]-- > 0 && p > 0)
      reps[--p] = b;
    while(reps[p] == 0 && p < l)
      ++p;
    
    printf("%d", p);
  }
}

int main(){

  int b = 6; int l = 3;

  // recursive
  powers_recursive(b,l); printf("%d", l);
  printf("\n");

  // loop + goto
  powers_loop_goto(b,l);
  printf("\n");
  
  // loop + break
  powers_loop_break(b,l);
  printf("\n");

  powers_loop_slick(b,l);
  printf("\n");
  
  // loop
  powers_loop(b,l);
  printf("\n");

  return 0;
}