2017.6.21

作业1

class Demo{

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);//2

else

System.out.println("y="+y+",x="+x);//0

}

}

作业2

int n = 5,m = 13;

//插入代码，实现n和m值的交换

int temp;

temp=n;

n=m;

m=temp

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

作业3

package zuoye;

public class Xiaofei {
 public static void main(String[] args){
 double tiXu=245;
 double wangQiu=570;
 double pai=320;
 System.out.println((2*tiXu+wangQiu+pai)*0.8);
 System.out.println("******消费单******");
 System.out.println("购买物品\t  单价\t个数\t金额");
 System.out.println("T恤衫\t￥245\t 2\t490");
 System.out.println("网球鞋\t￥570\t1\t570");
 System.out.println("网球拍\t￥320\t1\t320");
 
 System.out.println("折扣：\t\t  8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\t￥369.0");
 System.out.println("本次购物所获得的积分是：33");
 } 
}

作业4

package zuoye;
import java.util.Scanner;
public class Xingyunkehu {

 public static void main(String[] args){
  Scanner in=new Scanner(System.in);
  System.out.println("请输入4位会员卡号");
  int num=in.nextInt();
  int num1=in.nextInt();
  int num2=in.nextInt();
  int num3=in.nextInt();
  int zhi= num+num1+num2+num3;
  boolean v=(zhi>20)?true:false;
  System.out.println(v);
  
 }
}

作业5

package zuoye;
import java.util.Scanner;
public class Zhekou {
 public static void main(String[] args){
  Scanner in=new Scanner(System.in);
  System.out.println("请输入折扣");
  double zheKou=in.nextDouble();
  double ti=300;
  double xie=250;
  double pai=100;
  double ti1=ti*zheKou;
  double xie1=xie*zheKou;
  double pai1=pai*zheKou;
  boolean ti2=(ti1>100)?true:false;
  boolean xie2=(xie1>100)?true:false;
  boolean pai2=(pai1>100)?true:false;
   System.out.println(ti2); 
   System.out.println(xie2);
   System.out.println(pai2);
  
 }
}