UseRecursion.java

import java.util.Scanner;
 
public class UseRecursion { 
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
 
        System.out.println("輸入兩數:"); 
        System.out.print("m = "); 
        int m = scanner.nextInt();

        System.out.print("n = "); 
        int n = scanner.nextInt();

        System.out.println("GCD: " + gcd(m, n)); 
    } 
 
    private static int gcd(int m, int n) { 
        if(n == 0) 
            return m; 
        else 
            return gcd(n, m % n); 
    } 
}