17-3

#include <stdio.h>
#include <stdlib.h>
#include <Windows.h>

int main()
{
int n,xu,yu,cif,i,j,k,xo,yo;
printf("Unesite neparan prirodan broj n: ");
xu=wherex();
yu=wherey();
do{
gotoxy(xu,yu);
printf("    ");
gotoxy(xu,yu);
n=0;
do{
do{
cif=getch();
}while(((cif<'0'||cif>'9')||(n==0&&cif=='0'))&&cif!=13);
if(cif!=13){
n=n*10+cif-48;
printf("%c",cif);
}
}while(cif!=13);
}while(n<3||n>11||n%2==0);
gotoxy(40-n/2,13);
xu=wherex();
yu=wherey()+1;
for(i=1;i<=n;i++){
    yu--;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
for(i=1;i<=n-1;i++){
    xu--;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
for(i=1;i<=n-1;i++){
    yu++;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
for(i=1;i<=n-1;i++){
    xu++;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
gotoxy(40+n/2,13);
xu=wherex()-1;
yu=wherey();
for(i=1;i<=n;i++){
    xu++;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
for(i=1;i<=n-1;i++){
    yu--;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
for(i=1;i<=n-1;i++){
    xu--;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
for(i=1;i<=n-1;i++){
    yu++;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
gotoxy(40+n/2,13);
xu=wherex()+1;
yu=wherey();
for(i=1;i<=n;i++){
    xu--;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
for(i=1;i<=n-1;i++){
    yu++;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
for(i=1;i<=n-1;i++){
    xu++;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
for(i=1;i<=n-1;i++){
    yu--;
    gotoxy(xu,yu);
    printf("*");
    Sleep(500);
}
gotoxy(1,22);
getch();
return 0;
}