c#多功能计算器怎么制作

Question

保护加减乘除，三角函数，log，开平方，平方，退格，记忆加减清除，多重括号，
主要制作思路是什么

Answer 1

可用OOP思路
界面,功能,方法
做出来不难

Answer 2

微软已经把“计算器”开源，c++代码，有兴趣自己看ps：基本上为命令模式，命令字+命令参数底层：后缀表达式，有限状态机。因为是单步执行，所以这个就够了。如果是批次执行，需要知识 “词法分析”+“表达式树”+“访问者模式”+“命令模式”基本演示 1+2栈：
操作数栈 1,2
操作符栈 +操作符出栈：+-------------+操作，操作需要2操作数（左操作数+右操作数）-----操作数出2个操作数------------命令模式发给add操作方法

Answer 3

若只是作业，不是职业开发的话，可以参考：
log，三角函数，开方等都已经封装到了Math这个类里面，调用即可
退格不就是删除么
记忆，应该就是保存运算值有括号就难了点，参考楼上几位

Answer 4

public class Calculator
        {
            public Calculator()
            {
                _OptStack = new Stack<char>();
                _SuffixStack = new Stack<float>();
            }
 
            private Stack<char> _OptStack;
            private Stack<float> _SuffixStack;
 
            public float Calculate(string expression)
            {
                string lastNum = string.Empty;
                for (int i = 0; i < expression.Length; i++)
                {
                    if (char.IsNumber(expression[i]) || expression[i].Equals('.'))
                    {
                        lastNum += expression[i];
                    }
                    else
                    {
                        if (lastNum != string.Empty)
                        {
                            Merger(float.Parse(lastNum));
                            lastNum = string.Empty;
                        }
                        AddOpt(expression[i]);
                    }
                }
                if (lastNum != string.Empty)
                {
                    Merger(float.Parse(lastNum));
                }
                while (_OptStack.Count > 0)
                {
                    Merger(_OptStack.Pop());
                }
 
                return _SuffixStack.Pop();
            }
 
            private void AddOpt(char opt)
            {
                if (_OptStack.Count == 0)
                {
                    _OptStack.Push(opt);
                    return;
                }
                if (opt.Equals(')'))
                {
                    while (!_OptStack.Peek().Equals('('))
                    {
                        Merger(_OptStack.Pop());
                    }
                    _OptStack.Pop();
                    return;
                }
                char tempOpt = _OptStack.Peek();
                if ((opt.Equals('-') || opt.Equals('+')) &&
                    (tempOpt.Equals('*') || tempOpt.Equals('/')))
                {
                    while (_OptStack.Count > 0)
                    {
                        Merger(_OptStack.Pop());
                    }
                }
 
                _OptStack.Push(opt);
            }
 
            private void Merger(float exp)
            {
                _SuffixStack.Push(exp);
            }
 
            private void Merger(char exp)
            {
                float num1 = _SuffixStack.Pop();
                float num2 = _SuffixStack.Pop();
                float result = 0;
                switch (exp)
                {
                    case '+':
                        result = num2 + num1;
                        break;
                    case '-':
                        result = num2 - num1;
                        break;
                    case '*':
                        result = num2 * num1;
                        break;
                    case '/':
                        result = num2 / num1;
                        break;
                    case。可以加上log、sin。。什么的
                        break;
                }
                _SuffixStack.Push(result);
            }
        }
调用，做个输入界面，取最后的string就行了string calc = "89+(126/2)*3-6/3+(96+3-8/2)";// 随便写四则运算
Calculator calculator = new Calculator();
 MessageBox.Show(calculator.Calculate(calc).ToString()); // 结果

Answer 5

isnumber函数是在哪个空间里，还是说自己建立的