java

 class Dyy {
public static void main(String[] args){
int x=0,y=1;
if(++x==y-- & x++==1||--y==0)
System.out.println("x="+x+",y="+y);// x=2,y=0
else
System.out.println("y="+y+",x="+x);
}

}

 class Dyy1{
public static void main(String[] args){


int n = 5,m = 13;
int a;
int b;
a=n^m^n;
b=m^n^m;
n=a;
m=b;



System.out.println("n="+n+",m="+m);
   }
}

class Dyy2{
public static void main(String[] args){
int a=3,b=8;


int c=(a>b)?a++:b++;
//
System.out.println("a="+a+"\tb="+b+"\tc="+c);  //a=3    b=9    c=8


int d=(a>b)?++a:++b;
//
System.out.println("a="+a+"\tb="+b+"\td="+d);  //a=3    b=10   c=10


int e=(a<b)?a++:b++;
//
System.out.println("a="+a+"\tb="+b+"\te="+e);  //a=4    b=10   c=3




int f=(a<b)?++a:++b;
//
System.out.println("a="+a+"\tb="+b+"\tf="+f);  //a=5b=10 f=5
}
}

class Dyy5{
public static void main(String[] args){
       System.out.println("请输入4位会员卡号：");
int a=input.nextInt();
int b=a%10;
int c=a%100/10;
int e=a/100%10;
int f=a/1000;
int sum=b+c+e+f;
System.out.println("会员卡号"+a+"各位之和："+sum);
boolean m=(sum>20)?true:false;
System.out.print("是幸运客户吗？"+m);
   }
}

class Dyy4{
public static void main(String[] args){








System.out.println("***********消费单************");
System.out.println("购物物品\t单价\t个数\t金额");
System.out.println("T恤\t￥245\t2\t￥190");
System.out.println("网球鞋\t￥570\t1\t￥570");
System.out.println("网球拍\t￥320\t2\t￥320\n");
System.out.println("折扣：\t8折\n消费总金额￥"+sum);
double o=input.nextDouble();
System.out.println("实际交费￥"+o);
double p=o-sum;
System.out.println("找钱￥"+p);
int jifen=(int) ((sum/100)*3);
System.out.println("本次购物所获的积分是："+jifen);
  }
}

class Dyy6{
public static void main(String[] args){

System.out.println("请输入4位会员卡号：");
int a=input.nextInt();
int b=a%10;
int c=a%100/10;
int e=a/100%10;
int f=a/1000;
int sum=b+c+e+f;
System.out.println("会员卡号"+a+"各位之和："+sum);
boolean m=(sum>20)?true:false;
System.out.print("是幸运客户吗？"+m);

System.out.println("请输入4位会员卡号：");
int a=input.nextInt();
int b=a%10;
int c=a%100/10;
int e=a/100%10;
int f=a/1000;
int sum=b+c+e+f;
System.out.println("会员卡号"+a+"各位之和："+sum);
boolean m=(sum>20)?true:false;
System.out.print("是幸运客户吗？"+m);