100米掉落反彈3次, 100+50*2+25*2

dropSum

import java.util.Scanner;


public class Test {

    public static float dropSum(int heigh , int times){

        float result = 0;
        float temp = 0;

        for (int i = 1; i <=times ; i++) {
            if (i == 1) {
                temp = heigh;
                result += heigh;
            }else{
                temp = temp/2;
                result += temp*2;
            }
        }


        return result;

    }


    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        int inPut ;
        int inPut2;

        do {
            System.out.print("input heigh(0 to quit) :");
            inPut = scanner.nextInt();
            System.out.println();

            if (inPut != 0) {
                System.out.print("times : ");
                inPut2 = scanner.nextInt();
                System.out.println();

                System.out.println("dropSum : " + dropSum(inPut , inPut2));
            }



        }while ( inPut !=0);

        System.out.println("TKS");

    }

}