text: /*
  ** EPITECH PROJECT, 2021
  ** Libmy
  ** File description:
  ** up case all letter
  */
  
  int my_strlen(char const *);
  
  char *my_strupcase(char *str)
  {
      for (int i = 0; i < my_strlen(str); i++)
          if ('a' <= str[i] && str[i] <= 'z')
              str[i] = str[i] - 32;
      return str;
  }
  