Menentukan Hari Melalui Tanggal Yang Dimasukan Pada Bahasa C

#include<stdio.h>
#include<time.h>
#include<conio.h>

const char * const HARI[7] = {"Minggu","Senin","Selasa","Rabu","Kamis","Jumat","Sabtu"};
const char * const BULAN[12] = {"Januari","Februari","Maret","April","Mei","Juni",
                "juli","Agustus","September","Oktober","Nopember","Desember"};
int main(){
clrscr();
time_t t;
struct tm timeinfo;
int day, month, year;

t=time (NULL);
timeinfo = *localtime(&t);
printf("Masukkan Tanggal:");
scanf("%d", &day);
printf("Masukkan Bulan:");
scanf("%d", &month);
printf("Masukkan Tahun:");
scanf("%d", &year);
timeinfo.tm_mday=day;
timeinfo.tm_mon=month-1;
timeinfo.tm_year=year-1900;
mktime(&timeinfo) ;
printf("\nTanggal yang anda masukkan:\n");
printf("%s, %d %s %d\n",
    HARI[timeinfo.tm_wday],
    timeinfo.tm_mday,
    BULAN[timeinfo.tm_mon],
    timeinfo.tm_year+1900);
    getch();
    return 0;
}