import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int a = sc.nextInt(); int b = sc.nextInt(); int c = a; //存储a的原始值,递归过程中使用。 System.out.println(gcb(a, b, c)); } public static int gcb(int a, int b, int c) { if (a % b == 0) { //a...