Java计算器 [英] Java Calculator

问题描述

我刚刚开始使用java而我正在尝试制作一个简单的计算器，但我很困惑为什么我一直收到警告信息。

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解决方案

我刚开始使用java而我正在尝试制作一个简单的计算器，但我很困惑为什么我一直收到警告信息。

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如果你对代码发出警告就没关系了。

你声明并初始化d1和d2但是还没有在你的代码中使用它们......所以有警告显示。

感谢您的快速回复...我想我认为那部分...现在我在添加if语句时遇到问题......我我试图说我的算子是否等于''+''那么应该加上2个数字。就像，我说，我对此很新，所以如果我犯了愚蠢的错误，我道歉......这就是我到目前为止所做的：

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感谢您的快速回复...我想我认为那部分...现在我有了添加if语句的问题......我试图说我的运算符是否等于''+''那么应该添加2个数字。就像，我说，我对此很新，所以如果我犯了愚蠢的错误，我道歉......这就是我到目前为止所做的：

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I have just started using java and I''m trying to make a simple calculator, but I''m confused as to why I keep getting a warning message.

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解决方案

I have just started using java and I''m trying to make a simple calculator, but I''m confused as to why I keep getting a warning message.

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it doesn''t matter if you get warning on the code.
You declare&initialise d1 and d2 but not yet use them in your code...so there are warning show up.

Thanks for the quick reply...I think I figured that part out...now I''m having a problem adding if statements...I''m trying to say if my operator is equal to ''+'' then the 2 numbers should be added. Like, I said, I''m very new at this, so I apologize if I make stupid mistakes...this is what I have so far:

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Thanks for the quick reply...I think I figured that part out...now I''m having a problem adding if statements...I''m trying to say if my operator is equal to ''+'' then the 2 numbers should be added. Like, I said, I''m very new at this, so I apologize if I make stupid mistakes...this is what I have so far:

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