java 题目：输入两个正整数 m 和 n，求其最大公约数和最小公倍数。

import java.util.Scanner;

public class Pro9 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner in = new Scanner(System.in);
		int a;
		int b;
		int r;
		//最大公约数初值
		int gcd = 1;
		//最小公倍数
		int lcm = 0;
		System.out.println("请输入一个整数:");
		a = in.nextInt();
		System.out.println("请再输入一个整数：");
		b = in.nextInt();
		int oa = a;
		int ob = b;
		//辗转相除法
		while (b != 0) {
			r = a%b;
			a = b;
			b = r;
		}
		gcd = a;
		lcm = oa*ob/gcd;
		System.out.println( oa+ "和"+ ob +"的最大公约数为："+ gcd+"!");
		System.out.println( oa+ "和"+ ob +"的最小公倍数为："+ lcm+"!");
	}

}