为什么赢了'；我的Java程序显示的最后一行是什么？

可能重复：

对一组两个数字进行计算的小程序。我想要的是用户输入他们想要的编号和操作类型（包括顺序）。

---

计算结果不显示？有什么想法吗？非常感谢大家的帮助

您正在将y和x与A+A和B+B进行比较 你应该做的是：

（y.equals（“B”）| y.equals（“B”））

将管道

|

用作

或

语句，不要将它们与

+

连接起来

这是工作代码

import java.io.IOException;
import java.util.Scanner;

    public class SOScrap {
    public static void main (String [] args) throws IOException {
    int a;
    int b;
    String y;
    String x;
    Scanner input = new Scanner(System.in);

    System.out.println("Please enter number A:");
    a = input.nextInt();

    System.out.println("\nPlease enter number B:");
    b = input.nextInt();

    System.out.println("\nLastly, enter A if you wish it to be the dividor and/or subtractor, or if you wish it to be B, please enter B :");
    y=input.next();

    System.out.println("\nWhat would you like to do? Multiply (*), Divide (/), Subtract (-) or Add (+)? Please enter the symbol of which process you would like to have completed:");
    x=input.next();


    if (y.equals("B") || y.equals("b")) {

    if (    x.equals("*")) {
    System.out.println("\nThe product of these numbers is:" + (a*b));}
    else
    if (x.equals("/")) {
    System.out.println("\nThe quotient of these numbers is:" + (a/b));}
    else
    if (x.equals("+")) {
    System.out.println("\nThe sum of these numbers is:" + (a+b));}
    else
    if (x.equals("-")) {
    System.out.println("\nThe difference of these numbers is:" + (a-b));}}
    else{
    if (y.equals("A") || y.equals("a")){

    if (x.equals("*")) {
    System.out.println("\nThe product of these numbers is:" + (b*a));}
    else
    if (x.equals("/")) {
    System.out.println("\nThe quotient of these numbers is:" + (b/a));}
    else
    if (x.equals("+")) {
    System.out.println("\nThe sum of these numbers is:" + (b+a));}
    else
    if (x.equals("-")) {
    System.out.println("\nThe difference of these numbers is:" + ((b-a)));}}}
           }}

---

请更新您的最后一个问题。您需要：

y.equals（“b”）| y.equals（“b”）

代替

y.equals（“b”+“b”）

<代码>“b”+“b”导致

“bB”

提示：如果您正在学习java。不要经常发布你的问题。花一些时间调试和理解正在发生的事情。你永远也不会明白。为什么你的节目里有酸橙？我要一些豌豆，加上那些酸橙！回答得好，伙计+1注意你的缩进。另外，考虑只显示固定线的代码，而不是所有的行。

import java.io.IOException;
import java.util.Scanner;

    public class SOScrap {
    public static void main (String [] args) throws IOException {
    int a;
    int b;
    String y;
    String x;
    Scanner input = new Scanner(System.in);

    System.out.println("Please enter number A:");
    a = input.nextInt();

    System.out.println("\nPlease enter number B:");
    b = input.nextInt();

    System.out.println("\nLastly, enter A if you wish it to be the dividor and/or subtractor, or if you wish it to be B, please enter B :");
    y=input.next();

    System.out.println("\nWhat would you like to do? Multiply (*), Divide (/), Subtract (-) or Add (+)? Please enter the symbol of which process you would like to have completed:");
    x=input.next();


    if (y.equals("B") || y.equals("b")) {

    if (    x.equals("*")) {
    System.out.println("\nThe product of these numbers is:" + (a*b));}
    else
    if (x.equals("/")) {
    System.out.println("\nThe quotient of these numbers is:" + (a/b));}
    else
    if (x.equals("+")) {
    System.out.println("\nThe sum of these numbers is:" + (a+b));}
    else
    if (x.equals("-")) {
    System.out.println("\nThe difference of these numbers is:" + (a-b));}}
    else{
    if (y.equals("A") || y.equals("a")){

    if (x.equals("*")) {
    System.out.println("\nThe product of these numbers is:" + (b*a));}
    else
    if (x.equals("/")) {
    System.out.println("\nThe quotient of these numbers is:" + (b/a));}
    else
    if (x.equals("+")) {
    System.out.println("\nThe sum of these numbers is:" + (b+a));}
    else
    if (x.equals("-")) {
    System.out.println("\nThe difference of these numbers is:" + ((b-a)));}}}
           }}