晋晨瑞

1.

class Demo{

public static void main(String[] args){

int x=0,y=1;

if(++x==y-- & x++==1||--y==0) //优先级x=x+1 y=1  x==y 结果是  true  x=1 结果true  .y=1-0==0 结果true

System.out.println("x="+x+",y="+y);//优先级 “”外面+号表示连接符 x=y=1

else

System.out.println("y="+y+",x="+x);//优先级 输入结果y=x=1

}

}

2.

class ZhuanHuan {
public static void main(String[] args){
int n = 5;
int m = 13;
int a;
a = n + m;
n = a - n;
m = a - m;
System.out.println("n="+n+",m="+m);
}
}

3.

class Demo{

public static void main(String[] args){

int a=3,b=8;

 

int c=(a>b)?a++:b++;

// c=8 

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

 

int d=(a>b)?++a:++b;

//d=10

System.out.println("a="+a+"\tb="+b+"\td="+d);  //a=3 b=10 d=10

 

int e=(a<b)?a++:b++;

//e=3 

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

 

int f=(a<b)?++a:++b;

//f=5

System.out.println("a="+a+"\tb="+b+"\tf="+f);  //a=5 b=10 f=5

}

}

 4.

class ZhuanHuan{
public static void main(String[] args){
int a = 245;
int b = 570;
int c = 320;
int d =(a*2+b+c);
System.out.println(d);
double x=(d*0.8);
System.out.println("消费总金额:"+x);
}
}

5.

class ZhuanHuan{
public static void main(String[] args){
System.out.println("购物物品"+"\t单价"+"\t各数"+"\t金额");
System.out.println("T恤"+"\t¥245"+"\t2"+"\t¥490");
System.out.println("网球鞋"+"\t¥570"+"\t1"+"\t¥570");
System.out.println("网球拍"+"\t¥320"+"\t1"+"\t¥320\n\n)";
System.out.println("折扣"+"\t8折")";
System.out.println("消费总金额"+"\t¥1104.0")";
System.out.println("实际交费"+"\t¥1500")";
System.out.println("找钱"+"\t¥396")";
System.out.println("本次购物所获的积分是:33")";


}
}

6.

import Java.util.Scanner;


class ZhuanHuan{


static Scanner input = new Scanner(System.in);
public static void main(String[] args){
System.out.println("请输入会员卡号");
int a = input.nextInt();
int g = a/1000;
int s = a%100/10;
int b = a/100%10;
int q = a/1000;
int sum = g+s+b+q;
// System.out.println(g);
// System.out.println(s);
// System.out.println(b);
// System.out.println(q);
boolean boo = (sum>20)?true:false;
System.out.println(boo);


}
}

7.

import java.util.Scanner;
class ZhuanHuan{
public static void main(String[] args){
Scanner input = new Scanner(System.in);
System.out.println("请输入折扣");
double a = input.nextDouble();
int b = 100;
boolean zhekou = (a < b)? true:false;
System.out.println(zhekou);
System.out.println("请输入折扣");
double a1 = input.nextDouble();
int b1 = 100;
boolean zhekou1 = (a1 < b1)? true:false;
System.out.println(zhekou);
System.out.println("请输入折扣");
double a2 = input.nextDouble();
int b2 = 100;
boolean zhekou2 = (a2 < b2)? true:false;
System.out.println(zhekou);
}
}