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尝试解答一下，这个里面还有老年和教师的判断就省略，主要是打折的代码
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import java.util.Scanner;
class Test{
public static void main (String[] args){
Scanner sc = new Scanner(System.in);
System.out.println("请输入消费的金额：");
double oldprice = sc.nextDouble();
double newprice;
if(oldprice = 2000){
newprice = oldprice * 春笑0.85;
}else if(oldprice = 1000 oldprice 2000){
伍做 newprice = oldprice * 0.9;
}else
newprice = oldprice;
Judge jud = new Judge();
if(jud.isTeacher()|| jud.isOldman())
newprice = newprice * 0.95;
System.out.println("打折后的价格是：" + newprice);
System.out.println("折扣的程度是： " + newprice / oldprice);
}
}
class Judge{
public boolean isTeacher(){
boolean isTeacher = false;
return isTeacher;
}
public boolean isOldman(){
boolean isOld = false;
腔森衡 return isOld;
}
}
boolean user=true;
double jg=100;
int xfcount;
三个变凳碰量自己吵搜决定升粗历
if(user){
jg*0.9;
}
if(user==falsexfcount200){
jg*0.9;
}
if(user==truexfcount200){
jg*0.8;
}
//第一题的答案：
import java.util.Scanner;
public class test {
public static void main(String[] args)
{
System.out.println("输入购买金额：");
Scanner input=new Scanner(System.in);
double a=input.nextDouble();
System.out.println("输入顾客类型（会员或普通）：");
String b=input.next();
if(b=="会员")
{
if(a=100)
{
a=a*0.8;
System.out.println("需付款："+a);
}
else
{
System.out.println("携州需付款："+a);
}
}
if(b=="普通")
{
if(a=200)
{
a=a*0.75;
System.out.println("需付款："+a);
}
else
{
System.out.println("需付款："+a);
}
}
}
}
//下面是第二题答案：
public class test {
public static void main(String[] args)
{ 陵烂
for(int i = 0; i 3; i++)
{
for(int x = i + 1; x 3; x++)
{
System.out.print(" ");
}
for(int y = 0; y (i + 1) * 2 - 1; y++)
{
System.out.print("*");
}
System.out.println();
}
尺隐漏 for(int i = 0; i 4; i++)
{
for(int x = 0; x i; x++)
{
System.out.print(" ");
}
for(int y = i; y 2 * 4 - i - 1; y++)
{
System.out.print("*");
}
System.out.println();
}
}
}