private static string parse_Equation(char[] expr, int index)
{
CalculatorLogic cl = new CalculatorLogic();
string num = "";
if((int)expr[index]==83){
index += 4;
if((int)expr[index]==32){
for(int i = index; i<= expr.Length-2;i++)
num += expr [i].ToString();
}
double srt_num = double.Parse (num);
IUnaryOperator sqrt = new Sqrt ();
return Convert.ToString(sqrt.perform (srt_num));
}
if((int)expr[index]==82){
index += 10;
if((int)expr[index]==32){
for(int i = index; i<= expr.Length-2;i++)
num += expr [i].ToString();
}
double srt_num = double.Parse (num);
IUnaryOperator reci = new Reciprocal ();
return Convert.ToString(reci.perform (srt_num));
}
if((int)expr[index]==78){
index += 6;
if((int)expr[index]==32){
for(int i = index; i<= expr.Length-2;i++)
num += expr [i].ToString();
}
double srt_num = double.Parse (num);
IUnaryOperator neg = new Negate ();
return Convert.ToString(neg.perform (srt_num));
}
while (index != expr.Length - 1) {
double x = getDouble (expr, ref index);
char op = expr [index];
index++;
if (op == '\r') {
cl.AcceptNumber (x, null);
string result = cl.Equals ();
return result;
}
perform_op (x, op, cl);
}
return "";
//return value;
}
// evaluator
private void btnEq_Click(object sender, EventArgs e)
{
Expression expression;
Double sndArgument = new Double();
if (textBoxRes.Text.Equals("x") || textBoxRes.Text.Equals("y") || textBoxRes.Text.Equals("z"))
{
using (var form = new CalculatorValueForVariables())
{
var result = form.ShowDialog();
if (result == DialogResult.OK)
{
sndArgument = form.varValue;
}
}
}
else
{
sndArgument = Double.Parse(textBoxRes.Text);
}
switch (calcOperator)
{
case "sqrt":
if (!(resultValue < 0))
{
expression = new Sqrt(resultValue);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
}
else
{
textBoxRes.Text = "Can't calculate sqrt of a neg num!";
}
break;
case "neg":
expression = new Opposite(resultValue);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
break;
case "cos":
expression = new Cosinus(resultValue);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
break;
case "sin":
expression = new Sinus(resultValue);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
break;
case "exp":
expression = new Exponentation(resultValue);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
break;
case "abs":
expression = new Abs(resultValue);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
break;
case "log":
if (resultValue > 0)
{
expression = new Log(resultValue);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
}
else
{
textBoxRes.Text = "Can't calculate log of a neg num!";
}
break;
case "+":
labelCurrentExpr.Text += sndArgument;
expression = new Addition(resultValue, sndArgument);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
break;
case "-":
labelCurrentExpr.Text += sndArgument;
expression = new Subtraction(resultValue, sndArgument);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
break;
case "*":
labelCurrentExpr.Text += sndArgument;
expression = new Multiplication(resultValue, sndArgument);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
break;
case "/":
labelCurrentExpr.Text += sndArgument;
if (!sndArgument.Equals(0))
{
expression = new Division(resultValue, sndArgument);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
}
else
{
textBoxRes.Text = "Can't divide by 0";
}
break;
case "^":
labelCurrentExpr.Text += sndArgument;
expression = new Power(resultValue, sndArgument);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
break;
case "%":
labelCurrentExpr.Text += sndArgument;
expression = new Modulo(resultValue, sndArgument);
finalValue = expression.Evaluate();
textBoxRes.Text = finalValue.ToString();
break;
}
resultValue = 0;
labelCurrentExpr.Text = "";
}
void CreateOperators()
{
// Only one of each operation Token needs to be created
opAdd = new Add(workStack);
opSubtract = new Subtract(workStack);
opMultiply = new Multiply(workStack);
opDivide = new Divide(workStack);
opPower = new Power(workStack);
opBracket = new Bracket();
opUnaryMinus = new UnaryMinus(workStack);
opUnaryPlus = new UnaryPlus();
opSqrt = new Sqrt(workStack);
opSin = new Sin(workStack);
opCos = new Cos(workStack);
opTan = new Tan(workStack);
opLog = new Log(workStack);
opAsin = new Asin(workStack);
opAcos = new Acos(workStack);
opAtan = new Atan(workStack);
functions = new Dictionary<string, Function>
{
{"sqr", opSqrt },
{"sin", opSin },
{"cos", opCos },
{"tan", opTan },
{"log", opLog },
{"asin", opAsin },
{"acos", opAcos },
{"atan", opAtan }
};
binaryOperators = new Dictionary<char, BinaryOperator>
{
{'+', opAdd },
{'-', opSubtract },
{'*', opMultiply },
{'/', opDivide },
{'^',opPower }
};
}
