1.消费单
购买物品 单价 个数 金额
T恤 ¥245 2 490
网球鞋 ¥570 1 570
网球拍 ¥320 1 320
折扣是: 8折
消费总金额是 ¥1104.0
请输入实际交费
1500
实际交费是1500
找钱 ¥396.0
import java.util.Scanner;
public class Demon02 {
public static void main(String[] args) {
Scanner s1= new Scanner(System.in);
System.out.println("请输入要购买的T恤个数:");
int num1=s1.nextInt();
int tp=245;
int sum1=tp*num1;
System.out.println("请输入要购买的网球鞋的个数:");
int num2=s1.nextInt();
int wx=570;
int sum2=wx*num2;
System.out.println("请输入要购买的网球拍的个数:");
int num3=s1.nextInt();
int wp=320;
int sum3=wp*num3;
System.out.println("******消费单******");
System.out.println("购买物品\t单价\t个数\t金额\t");
System.out.println("T恤\t ¥245\t"+num1+"\t"+sum1);
System.out.println("网球鞋\t ¥570\t"+num2+"\t"+sum2);
System.out.println("网球拍\t ¥320\t"+num3+"\t"+sum3);
System.out.println("折扣是: 8折");
System.out.println("消费总金额是 ¥"+(sum1+sum2+sum3)*0.8);
System.out.println("请输入实际交费");
int sum4=s1.nextInt();
System.out.println("实际交费是"+sum4);
System.out.println("找钱 ¥"+(sum4-(sum1+sum2+sum3)*0.8));
}
}
请输入一个圆的半径:
10
该圆的面积是:314.1592653589793
2.圆的面积
import java.util.Scanner;
public class circle {
public static void main(String[] args) {
Scanner s1=new Scanner(System.in);
System.out.println("请输入一个圆的半径:");
double r=s1.nextInt();
double sumpi=(r*r)*Math.PI;
System.out.println("该圆的面积是:"+sumpi);
}
}
3.幸运用户
请输入4位卡号
1234
会员卡号1234各位之和:11
是幸运客户吗?false
import java.util.Scanner;
public class lucky {
public static void main(String[] args) {
boolean flag;
Scanner s1=new Scanner(System.in);
System.out.println("请输入4位卡号");
int num=s1.nextInt();
int a=num/1000;
int b=(num%1000)/100;
int c=((num%1000)%100)%10;
int d=num%10;
int sum=a+b+c+d;
flag=sum>23;
System.out.println("会员卡号"+num+"各位之和:"+sum);
System.out.println("是幸运客户吗?"+flag);
}