C#

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

int getID();

int main (void)
{
    int getnum,y,x,w;
    char c;
    
    do{
    getnum=getID();
    y=getnum/10000;
    w=getnum/1000;
    x=w%y;
    
    if(x != 0 || x != 1)
    {
            printf("INVALID VALUE!\nEnter new value: ");
    }
    else 
    {
    printf("y = %d\n\nx = %d\n", y, x);
    printf("do you want to continue, yes / no");
    c = getch ();
    }

    }while (c =='y' || c=='Y');
    getch();
    return 0;   
}

int getID()
{
    int id;
    printf("ID number: ");
    scanf("%d", &id);
    return id;
}
</conio.h></stdio.h>