编辑代码

class Main {
    public static void main(String[] args) {
        Integer length = 1680;
        Integer width = 640;
        System.out.println(fendiDG(length, width));

        System.out.println(fendiDT(length, width));
	}
	
    public static Integer fendiDG(Integer L, Integer W) {
        if(L % W == 0) {
            return W;
        }

        return fendiDG(W, L % W);
    }


    public static Integer fendiDT(Integer L, Integer W) {
        Integer i = 0;
        while(W > 0) {
            i = L;
            L = W;
            W = i % W;
            if(L % W == 0)
                break;
        }
        return W;  
    }


    
}