#include <stdlib.h>

char    *calcul(char *exph, char *expb, int b, int c)
{
  int   ret;
  char  *resul;
  int   a;

  ret = 48;
  a = my_strlen(exph) <= my_strlen(expb) ? my_strlen(expb) : my_strlen(exph);
  a = my_strlen(exph) > my_strlen(expb) ? my_strlen(exph) : my_strlen(expb);
resul = malloc(sizeof (*resul) * (a + 2));
  resul[a + 1] = '\0';
  a -= 1;
  while (a >= -1)
    {
      resul[a + 1] = (a + c >= 0) ? exph[a + c] - 48 : 0;
      resul[a + 1] += (a + b >= 0) ? expb[a + b] - 48 : 0;
      resul[a + 1] += ret;
      ret = 48;
      if ((resul[a + 1]) > 57)
        {
          ret = 49;
          resul[a + 1] -= 10;
        }
      a--;
    }
  return (resul);
}

void    my_add(char *exph, char *expb, int taille1, int taille2)
{
  int   b;
  int   c;
  char  *resul;

  c = 0;
  b = 0;
  if (taille1 <= taille2)
    c = taille1 - taille2;
  else if (taille1 > taille2)
    b = taille2 - taille1;
  resul = calcul(exph, expb, b, c);
  free(resul);
  printf("%s\n", resul);
}

int     main(int argc, char **argv)
{
  char  *exph;
  char  *expb;
  int   taille1;
  int   taille2;

  if (argc == 3)
    {
      exph = argv[1];
      expb = argv[2];
      taille1 = my_strlen(exph);
      taille2 = my_strlen(expb);
      my_add(exph, expb, taille1, taille2);
    }
  else
    write(1, "Une addition a besoin de 2 nombres !\n", 38);
}