C#如何实现简易计算器小功能

这篇文章主要介绍C#如何实现简易计算器小功能，文中介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们一定要看完！

具体内容如下

简易的登陆界面。

具有幻灯片效果。（picturebox time控件）
计算器支持多位数，小数，括号的运算。

音乐是一个练习用的小控件（Listbox），可以选择指定的歌曲播放，直接忽略掉吧。

建立winform窗体

数字和运算符都为button，输入和输出的为textbox

基本代码

在所有button控件的click事件均为加上所对应的文本。
例如：数字1所对应的button就为

textBox1.Text += '1';

运算符同理

textBox1.Text += '*';

核心代码

核心代码均在‘=’的click的事件中

Stack<double> vs = new Stack<double>();//运算符栈
Stack<char> vvs = new Stack<char>();//操作符栈
       string a = textBox1.Text + '=';
       string b = "";
       vvs.Push('=');
      for (int i = 0; i < a.Length; i++)
      {
       if (a[i] >= '0' && a[i] <= '9'||a[i]=='.')
      {
           b += a[i];
                }
                else if (a[i] == '=')
                {
                    if (b != "")
                        vs.Push(Convert.ToDouble(b));
                    while (vvs.Peek() != '=')
                    {
                        char t = vvs.Pop(); double d = vs.Pop();
                        if (vs.Count() != 0)
                        {
                           
                            double j = vs.Pop();
                            vs.Push(Jisuan(d, t, j));
                        }
                        else
                        {
                            MessageBox.Show("你输入的有问题");
                            textBox1.Text = "";
                        }
                    }
                }
                else
                {
                    if (b != "")
                        vs.Push(Convert.ToDouble(b));
                    switch (Bijiao(vvs.Peek(), a[i]))
                    {
                        case '>':
                            while (vvs.Count != 1 && vvs.Peek() != '(')
                            {
                                char th = vvs.Pop();                                                           
                                 double f = vs.Pop();                                                                                     
                                 double g = vs.Pop();                              
                                vs.Push(Jisuan(f, th, g));


                            }
                            if (vvs.Peek() == '(' && a[i] == ')')
                            {
                                vvs.Pop();

                            }
                            else
                            {
                                vvs.Push(a[i]);
                            }
                            break;
                        case '<':
                            vvs.Push(a[i]);
                            break;
                        case '=':
                            while (vvs.Peek() != '=')
                            {
                                char th = vvs.Pop();
                                double f = vs.Pop();
                                double g = vs.Pop();
                                vs.Push(Jisuan(f, th, g));
                         }
                            break;

                    }
                    b = "";
                }
            }
            textBox1.Text = "";
            if(vs.Count()!=0)
            { textBox1.Text = vs.Peek().ToString(); }
        }

所用到的方法（函数）

public double Jisuan(double c, char t, double a)//用来计算的方法
        {

            switch (t)
            {
                case '+':
                    return a + c;
                case '-':
                    return a - c;
                case '*':
                    return a * c;
                case '/':
                    if (c == 0)
                    {
                        MessageBox.Show("0不能作为被除数");
                        return  0;
                    }
                    else
                        return a / c;
                case '%':
                    return a % c;
                default:
                    return 0;
            }


        }
        char Bijiao(char theta1, char theta2)//比较运算符优先级的方法
        {
            if ((theta1 == '(' && theta2 == ')') || (theta1 == '#' && theta2 == '#'))
            {
                return '=';
            }
            else if (theta1 == '(' || theta1 == '#' || theta2 == '(' || (theta1
                  == '+' || theta1 == '-') && (theta2 == '*' || theta2 == '/'))
            {
                return '<';
            }
            else
                return '>';
        }

为了使计算器更加美观，可以添加picturebox控件等等。

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