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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