java（6）——+号和++号--号

public class AddTest{
	public static void main(String[] args){
		int a = +5;
		System.out.println(a);
		System.out.println(a+"13");
		System.out.println(a+'b');
	}
}

public class AddTest{
	public static void main(String[] args){
		int a = 1;
		++a;
		System.out.println(a);
		
		int b = 1;
		b++;
		System.out.println(b);
		
		int c = b++ + 2;
		System.out.println(c);
		System.out.println(b);
		
		int d = 3;
		int e = ++d + 2;
		System.out.println(e);
		System.out.println(d);
	}
}