My program seems not working right... help me fix it please.

Question

import java.util.Scanner;
public class Diet {
public static void main(String[] arga){

double H, A;
char Rec, Ciz, C, N, R;
Scanner input = new Scanner(System.in);
System.out.print("Enter the Height: ");
H=input.nextDouble();
System.out.print("Enter the Age: ");
A=input.nextDouble();
System.out.print("Enter the Citizenship: ");
Ciz = input.next().charAt(0);
C=0; N=0;

if(H >= 200 && A>= 21 && A<=25 && Ciz == C)
{
System.out.printf("Your ACCEPTED");
}
else if(Ciz == N)
{
System.out.printf("Your REJECTED");
}

System.out.print("Recommendation Jedi Master Obi Wan:");
Rec = input.next().charAt(0);
R=0; N=0;
if(Rec == R)
{
System.out.printf("Accepted Automatically");
}
else if(Rec == N)
{
System.out.printf("Your REJECTED");
}
else{
System.out.printf("There's wrong in your input!");
}

}
}

Answer 1

I think you need to enter each number on separate lines like:
210
21
0
0
And press submit.

Answer 2

21 - 25 age imean

Answer 3

how you can enter and scan empty ' ' char (ascii 0) ?

Ciz = input.next().charAt(0);
C=0;
if(Ciz == C)