问题描述

JAVA课程编程作业疑问

老师要求的用户界面显示结果如下：
This program computes the total cost of a purchase. Enter the price of the purchased item. 12.50
Enter how many items are purchased? 3
The final cost of the purchase with the 7% tax applied is $40.125
以下是我的代码：
package jave.util;
import java.util.Scanner;
public class Assignment1 {
public static void main(String[] args) {
System.out.println("Please input the number");
Scanner N= new Scanner(System.in);
System.out.println("Please input the price");
Scanner P= new Scanner(System.in);
int number=N.nextInt();
double price=P.nextDouble();
double cost= (price*number*1.07);
System.out.println("The final cost of the purchase with the 7% tax applied is " + cost);
// TODO Auto-generated method stub

}

}

此时我输入数值的时候，两个数值是连续输入的，请问怎么编写才能令输入一个数值之后，再提示输入另外一个？（另外代码有什么可以优化的地方也请知道一下）

解决方案

调整后大致如下，不需要两个Scanner 对象，也不要太多的变量声明
package jave.util;
import java.util.Scanner;
public class Assignment1 {
public static void main(String[] args) {
Scanner N= new Scanner(System.in);
System.out.println("Please input the number");
int number=N.nextInt();
System.out.println("Please input the price");
double price=N.nextDouble();
System.out.println("The final cost of the purchase with the 7% tax applied is $" +(price*number*1.07));
}
}

解决方案二：

调一下位置就行了；
System.out.println("Please input the number");
Scanner N= new Scanner(System.in);
int number=N.nextInt();
System.out.println("Please input the price");
Scanner P= new Scanner(System.in);
double price=P.nextDouble();
double cost= (price*number*1.07);
System.out.println("The final cost of the purchase with the 7% tax applied is " + cost);
// TODO Auto-generated method stub

解决方案三：

问题解决，请记得及时采纳，楼上，不然会被封…