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Program.cs
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Program.cs
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using System;
using System.Collections.Generic;
using System.Data;
namespace _3_kyu_Calculator
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("b" + Evaluate("123.45*(678.90 / (-2.5+ 11.5)-(80 -19) *33.25) / 20 + 11").ToString());
}
public static double Evaluate(string expression)
{
DataTable d = new DataTable();
return Convert.ToDouble(d.Compute(expression, "").ToString());
}
public static double Evaluate2(string expression)
{
expression = expression.Replace(" ", "");
expression = expression.Replace("(", " ( ");
expression = expression.Replace(")", " ) ");
expression = expression.Replace("+", " + ");
expression = expression.Replace("-", " - ");
expression = expression.Replace("*", " * ");
expression = expression.Replace("/", " / ");
string[] operatorlist = expression.Split(" ", StringSplitOptions.RemoveEmptyEntries);
int i = 0;
Stack<string> s = new Stack<string>();
string num_a, num_b;
string _operator;
while (i < operatorlist.Length)
{
s.Push(operatorlist[i]);
if ("*/".Contains(s.Peek()))
{
i++;
s.Push(operatorlist[i]);
num_b = s.Pop();
_operator = s.Pop();
num_a = s.Pop();
s.Push(DoCalc(num_a, _operator, num_b).ToString());
}
else if (")".Contains(s.Peek()))
{
s.Pop();
while (true)
{
num_b = s.Pop();
_operator = s.Pop();
num_a = s.Pop();
if (_operator == "(")
{
s.Push(num_a);
s.Push(num_b);
break;
}
else
{
s.Push(DoCalc(num_a, _operator, num_b).ToString());
}
}
}else if ("-".Contains(s.Peek()))
{
i++;
s.Push(operatorlist[i]);
num_b = s.Pop();
_operator = s.Pop();
num_a = s.Pop();
if ("+-*/()".Contains(num_a))
{
s.Push(num_a);
s.Push(DoCalc("0", _operator, num_b).ToString());
}
else
{
s.Push(DoCalc(num_a, _operator, num_b).ToString());
}
}
i++;
}
while (s.Count > 1)
{
num_b = s.Pop();
_operator = s.Pop();
num_a = s.Pop();
s.Push(DoCalc(num_a, _operator, num_b).ToString());
}
return Convert.ToDouble(s.Pop());
}
public static double DoCalc(string num_a, string _operator, string num_b)
{
double d_num_a = Convert.ToDouble(num_a);
double d_num_b = Convert.ToDouble(num_b);
if (_operator == "*")
{
return d_num_a * d_num_b;
}
else if (_operator == "/")
{
return d_num_a / d_num_b;
}
else if (_operator == "+")
{
return d_num_a + d_num_b;
}
else if (_operator == "-")
{
return d_num_a - d_num_b;
}
return 0.0;
}
}
}