HDOJ 2090 算菜价

HDACM 2090

注意：用Scanner类的hasNext()方法来控制循环

import java.util.Scanner;public class Main{    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        double sum = 0;        while (sc.hasNext()) {            sc.next();            double amount = sc.nextDouble();            double price = sc.nextDouble();            sum += amount*price;        }        System.out.printf("%.1f",sum);        System.out.println();        sc.close();    }}