题解 | 计算商场折扣

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);
        int price = console.nextInt();
        int cost = 0;

        if(price<100){
            cost = price;
        }else if(price>=100&&price<500){
            cost = (int)(price*0.9);
        }else if(price>=500&&price<2000){
            cost = (int)(price*0.8);
        }else if(price>=2000&&price<5000){
            cost=   (int)(price*0.7);
        }else {
            cost = (int)(price*0.6);
        }
        

        System.out.println(cost);
    }
}

直接分情况计算就行