题解 | #计算商场折扣#

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int i1 = in.nextInt();
        if (i1 < 100) {
            System.out.println(i1);
        } else if (i1 < 500) {
            i1 = (int)(i1 *0.9);//0.9默认为double类型与i1做运算后，（i1*0.9）变为double类型，
                                //此时应该进行强制类型转换。
            System.out.println(i1);
        } else if (i1 < 2000 ) {
            i1 = (int)(i1 * 0.8);

            System.out.println(i1);
        } else if (i1 < 5000 ) {
            i1 = (int)(i1 * 0.7);

            System.out.println(i1);
        } else {
            i1 = (int)(i1 * 0.6);

            System.out.println(i1);
        }
    }
}