#include "public.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

int main (void)
{
    
    char *ID_num=(char *)calloc(10,sizeof(char));
    t_login(ID_num);
    printf("%s\n",ID_num);
    show_the_taught_course(ID_num);
    show_who_choose_t_course();
    return 0;
}