用Java实现以下问题 最好用算法来实现？
用java实现以下场景，有100条商品，每个商品的价格0到1000元不等
商品数据:
{ id: 1, productName: '特价商品1', price: 200 },{ id: 2, productName: '特价商品2', price: 400 },
{ id: 3, productName: '特价商品3', price: 600 },
{ id: 4, productName: '特价商品4', price: 800 },
例如200元 加价之后就是240元 利润是40元
首先把0到300元的商品的加价30%，301到500的加价20%，501到1000元商品的加价10%，
然后0到300元的商品订单有300条，301-500的商品订单有400条，501-1000的商品订单有300条，
最后计算他的总利润有多少，最好写出算法
回答：
只计算总利润，那么关注每个元素的 price 即可。以下是一段伪代码示意：
CALC(A) R = 0
N = A.length
for i in 0..N
P = A[i].price
if P <= 300
R += P * 0.3
else if P <= 500
R += P * 0.2
else
R += P * 0.1
return R
若是计算的同时又需要修改，则可以加上这些：
CALC(A) R = 0
N = A.length
for i in 0..N
P = A[i].price
if P <= 300
R += P * 0.3
+ A[i].price *= 1.3
else if P <= 500
R += P * 0.2
+ A[i].price *= 1.2
else
R += P * 0.1
+ A[i].price *= 1.1;
return R
回答：
你确定这不是什么JAVA课的编程小作业吗..
import java.util.ArrayList;import java.util.List;
class Product {
private int id;
private String productName;
private double price;
public Product(int id, String productName, double price) {
this.id = id;
this.productName = productName;
this.price = price;
}
public double calculateProfit() {
double profit = 0;
if (price <= 300) {
profit = price * 0.3;
} else if (price <= 500) {
profit = price * 0.2;
} else if (price <= 1000) {
profit = price * 0.1;
}
return profit;
}
}
public class Main {
public static void main(String[] args) {
List<Product> products = new ArrayList<>();
products.add(new Product(1, "特价商品1", 200));
products.add(new Product(2, "特价商品2", 400));
products.add(new Product(3, "特价商品3", 600));
products.add(new Product(4, "特价商品4", 800));
int orderCount1 = 300;
int orderCount2 = 400;
int orderCount3 = 300;
double totalProfit = 0;
for (Product product : products) {
double profit = product.calculateProfit();
if (product.getPrice() <= 300) {
totalProfit += profit * orderCount1;
} else if (product.getPrice() <= 500) {
totalProfit += profit * orderCount2;
} else if (product.getPrice() <= 1000) {
totalProfit += profit * orderCount3;
}
}
System.out.println("总利润：" + totalProfit);
}
}
回答：
大概思路是，在 calculateTotalProfit 中，遍历所有商品，并根据价格范围确定对应的利润百分比（30%、20%、或10%）。然后，根据商品的价格和利润百分比计算单个商品的利润，并累加到 totalProfit 变量中。运行最后的时候，返回计算得到的总利润。代码比较简单，注释差不多都解释了，所以不做过多赘述。
import java.util.ArrayList;import java.util.List;
class Product {
int id;
String productName;
int price;
public Product(int id, String productName, int price) {
this.id = id;
this.productName = productName;
this.price = price;
}
}
public class ProfitCalculator {
public static void main(String[] args) {
List<Product> products = new ArrayList<>();
// 添加100条商品数据
// 例如：products.add(new Product(1, "特价商品1", 200));
// products.add(new Product(2, "特价商品2", 400));
// ...
int totalProfit = calculateTotalProfit(products);
System.out.println("总利润为：" + totalProfit + "元");
}
public static int calculateTotalProfit(List<Product> products) {
int totalProfit = 0;
for (Product product : products) {
int price = product.price;
int profitPercentage;
// 根据价格范围确定利润百分比
if (price <= 300) {
profitPercentage = 30;
} else if (price <= 500) {
profitPercentage = 20;
} else {
profitPercentage = 10;
}
// 计算单个商品的利润
int profit = price * profitPercentage / 100;
totalProfit += profit;
}
return totalProfit;
}
}
回答：
import java.util.ArrayList;import java.util.List;
class Product {
int id;
String productName;
double price;
double profit;
public Product(int id, String productName, double price) {
this.id = id;
this.productName = productName;
this.price = price;
this.profit = 0;
}
public void applyMarkup(double percentage) {
double markup = this.price * percentage;
this.profit = markup;
this.price += markup;
}
}
public class ProfitCalculator {
public static void main(String[] args) {
List<Product> products = new ArrayList<>();
// 假设这里已经填充了100条商品数据
for (int i = 1; i <= 100; i++) {
products.add(new Product(i, "特价商品" + i, (i * 10) % 1001));
}
int orderCount1 = 300; // 0-300元的订单数量
int orderCount2 = 400; // 301-500元的订单数量
int orderCount3 = 300; // 501-1000元的订单数量
double totalProfit = 0;
for (Product product : products) {
if (product.price <= 300) {
product.applyMarkup(0.3);
totalProfit += product.profit * orderCount1;
} else if (product.price <= 500) {
product.applyMarkup(0.2);
totalProfit += product.profit * orderCount2;
} else if (product.price <= 1000) {
product.applyMarkup(0.1);
totalProfit += product.profit * orderCount3;
}
}
System.out.println("总利润为: " + totalProfit + "元");
}
}
回答：
import java.util.ArrayList;import java.util.List;
class Product {
private int id;
private String productName;
private int price;
public Product(int id, String productName, int price) {
this.id = id;
this.productName = productName;
this.price = price;
}
public int getId() {
return id;
}
public String getProductName() {
return productName;
}
public int getPrice() {
return price;
}
}
public class Main {
public static void main(String[] args) {
List<Product> products = new ArrayList<>();
products.add(new Product(1, "特价商品1", 200));
products.add(new Product(2, "特价商品2", 400));
products.add(new Product(3, "特价商品3", 600));
products.add(new Product(4, "特价商品4", 800));
int totalProfit = calculateTotalProfit(products);
System.out.println("总利润：" + totalProfit + "元");
}
public static int calculateTotalProfit(List<Product> products) {
int totalProfit = 0;
for (Product product : products) {
int price = product.getPrice();
int profit;
if (price <= 300) {
profit = (int) (price * 0.3);
} else if (price <= 500) {
profit = (int) (price * 0.2);
} else {
profit = (int) (price * 0.1);
}
totalProfit += profit;
}
return totalProfit;
}
}
用java写的。
以上是 用Java实现以下问题 最好用算法来实现？ 的全部内容， 来源链接： utcz.com/p/945290.html
