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07.04/Calculator #46

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421ce8d
Added form and started realisation of core
IgnatSergeev Apr 21, 2023
f328424
expanded core
IgnatSergeev May 25, 2023
b0076b8
Finished core
IgnatSergeev May 25, 2023
1995f17
Fixed everything
IgnatSergeev May 25, 2023
45b5899
Fixed ci
IgnatSergeev May 25, 2023
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12 changes: 12 additions & 0 deletions C#/forSpbu/Calculator/Calculator.csproj
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<Project Sdk="Microsoft.NET.Sdk">

<PropertyGroup>
<OutputType>WinExe</OutputType>
<TargetFramework>net7.0-windows</TargetFramework>
<Nullable>enable</Nullable>
<UseWindowsForms>true</UseWindowsForms>
<ImplicitUsings>enable</ImplicitUsings>
<EnableWindowsTargeting>true</EnableWindowsTargeting>
</PropertyGroup>

</Project>
8 changes: 8 additions & 0 deletions C#/forSpbu/Calculator/Calculator.csproj.user
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="Current" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<ItemGroup>
<Compile Update="Form1.cs">
<SubType>Form</SubType>
</Compile>
</ItemGroup>
</Project>
277 changes: 277 additions & 0 deletions C#/forSpbu/Calculator/CalculatorCore.cs
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namespace Calculator;

public class CalculatorCore
{
private enum Operation
{
Add,
Sub,
Mul,
Div,
Mod,
Clear,
Equal,
None
}

private enum State
{
FirstOperandNumber,
FirstOperandComma,
SecondOperandNumber,
SecondOperandComma,
Operation,
Error,
None
}

private Operation StringGetOperation(string operationString)
{
return operationString switch
{
"+" => Operation.Add,
"-" => Operation.Sub,
"*" => Operation.Mul,
"/" => Operation.Div,
"mod" => Operation.Mod,
"C" => Operation.Clear,
"=" => Operation.Equal,
_ => throw new ArgumentOutOfRangeException(nameof(operationString), operationString, null)
};
}

public void TakeNumberToken(string numberString)
{
if (numberString is not ("0" or "1" or "2" or "3" or "4" or "5" or "6" or "7" or "8" or "9" or ","))
{
throw new ArgumentOutOfRangeException(nameof(numberString), numberString, null);
}

switch (_state)
{
case State.Error:
if (numberString != ",")
{
_number = numberString;
Expression = "";
_state = State.FirstOperandNumber;
}
break;
case State.FirstOperandComma:
if (numberString == ",")
{
_state = State.Error;
break;
}

_number += numberString;
_state = State.FirstOperandNumber;
break;
case State.FirstOperandNumber:
if (_hasComma && numberString == ",")
{
_state = State.Error;
break;
}

if (numberString == ",")
{
_hasComma = true;
}
_number += numberString;
break;
case State.SecondOperandComma:
if (numberString == ",")
{
_state = State.Error;
break;
}

_number += numberString;
_state = State.SecondOperandNumber;
break;
case State.SecondOperandNumber:
if (_hasComma && numberString == ",")
{
_state = State.Error;
break;
}

_hasComma = numberString == ",";
_number += numberString;
break;
case State.Operation:
if (numberString == ",")
{
_state = State.Error;
break;
}

_number = numberString;
if (_operation == Operation.Equal)
{
_operation = Operation.None;
Expression = "";
_state = State.FirstOperandNumber;
break;
}

_state = State.SecondOperandNumber;
break;
case State.None:
if (numberString == ",")
{
_number += numberString;
_state = State.FirstOperandComma;
_hasComma = true;
}
else
{
_number = numberString;
_state = State.FirstOperandNumber;
}

Expression = "";

break;
}

if (_state == State.Error)
{
Expression = "";
_number = "Error";
_hasComma = false;
}
}

private void ApplyOperation()
{
switch (_operation)
{
case Operation.Add:
_firstOperand += _secondOperand;
break;
case Operation.Sub:
_firstOperand -= _secondOperand;
break;
case Operation.Mul:
_firstOperand *= _secondOperand;
break;
case Operation.Div:
if (_secondOperand is < Delta and > -Delta)
{
_state = State.Error;
break; // Можно как фишку оставить, будет бесконечность
}
_firstOperand /= _secondOperand;
break;
case Operation.Mod:
if (_secondOperand is < Delta and > -Delta)
{
_state = State.Error;
break;
}
_firstOperand %= _secondOperand;
break;
}
}

public void TakeOperationToken(string operationString)
{
var operation = StringGetOperation(operationString);
if (operation == Operation.Clear)
{
_state = State.None;
_operation = Operation.None;
Expression = "";
_number = "0";
_hasComma = false;
return;
}

switch (_state)
{
case State.Error:
break;
case State.FirstOperandComma:
_state = State.Operation;
_number = _number.Remove(_number.Length - 1);

if (!double.TryParse(_number, out _firstOperand))
{
throw new ArgumentOutOfRangeException(nameof(_number), _number, null);;
}

_operation = operation;
Expression = _firstOperand + " " + operationString;
break;
case State.FirstOperandNumber:
_state = State.Operation;
if (!double.TryParse(_number, out _firstOperand))
{
throw new ArgumentOutOfRangeException(nameof(_number), _number, null);;
}

_operation = operation;
Expression = _firstOperand + " " + operationString;
break;
case State.SecondOperandComma:
_state = State.Operation;
_number = _number.Remove(_number.Length - 1);
if (!double.TryParse(_number, out _secondOperand))
{
throw new ArgumentOutOfRangeException(nameof(_number), _number, null);
}

ApplyOperation();
_operation = operation;

Expression = _firstOperand + " " + operationString;
_hasComma = false;
_number = "";

break;
case State.SecondOperandNumber:
_state = State.Operation;
if (!double.TryParse(_number, out _secondOperand))
{
throw new ArgumentOutOfRangeException(nameof(_number), _number, null);
}

ApplyOperation();
_operation = operation;

Expression = _firstOperand + " " + operationString;
_hasComma = false;
_number = "";

break;
case State.Operation:
_operation = operation;
Expression = _firstOperand + " " + operationString;
break;
case State.None:
_state = State.Operation;
_operation = operation;
Expression = "0 " + operationString;
break;
}

if (_state == State.Error)
{
Expression = "";
_number = "Error";
}
}

private double _firstOperand = 0;
private double _secondOperand = 0;
private Operation _operation = Operation.None;
private State _state = State.None;
private string _number = "0";
private bool _hasComma = false;
private const double Delta = 0.0001;

public string Number => _number;
public string Expression { get; private set; } = "";
}
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