319上机练习

package one;

public class Demo01 {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int a = 5;
		int b = 6;
		int c = a;
		a = b;
		b = c;
		System.out.println(a);  
		System.out.println(b);
	}
}

　　

package one;

public class Demo01 {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int a = 456;
        int ge = a%10;
        int shi = a/10%10;
        int bai = a/100%10;
        int total = ge + shi + bai;
        System.out.println(total);
    }
}