C#项目简单计算器 [英] c# project simple calculator

问题描述

我正在C#Visual Express 2013中构建一个非常简单的计算器.我正在看一本书.这里是第一周的编码器.

I am building a very simple calculator in C# Visual Express 2013. I am following a book. First week coder here.

http://www.homeandlearn.co.uk/csharp/calculator1.txt

在上面编写的代码中，我看不懂其中的一段代码:

In the code written above I do not understand one piece of code:

private void btnClear_Click(object sender, EventArgs e) 
{
    plusButtonClicked = false;
    minusButtonClicked = false;
    divideButtonClicked = true;
    multiplyButtonClicked = false;

    txtDisplay.Clear();
}

在这里拥有这些布尔值的附加价值是什么?仅编写 txtDisplay.Clear(); 不足以使 btnClear_Click 执行计算器的行为吗?

What is the added value of having these booleans here? Is only writing txtDisplay.Clear(); not enough for the btnClear_Click to perform behaviour of a calculator?

推荐答案

请参阅平等按钮":

private void btnEquals_Click(object sender, EventArgs e) {

        if (plusButtonClicked == true) {
            total2 = total1 + double.Parse(txtDisplay.Text);
        }
        else if (minusButtonClicked == true) {
            total2 = total1 - double.Parse(txtDisplay.Text);
        }
        else if (multiplyButtonClicked == true) {
            total2 = total1 * double.Parse(txtDisplay.Text);
        }
        else if (divideButtonClicked == true) {
            total2 = total1 / double.Parse(txtDisplay.Text);
        }

        txtDisplay.Text = total2.ToString();
        total1 = 0;
    }

开发人员想知道用户是否单击了equal按钮，程序应该怎么做....就像一个真正的计算器一样.但是对于清除按钮，所有标志都应设置为 false .

The developer wants to know if the user clicked on equal button , what should the program do .... just like a real calculator. But for the clear button All of the flags should be set to false.

这篇关于C#项目简单计算器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！