public void ShouldAbsoluteNumbers()
{
Calculator calc = new Calculator();
Assert.AreEqual(2, calc.Absolute(2));
Assert.AreEqual(1.5, calc.Absolute(-1.5));
Assert.AreEqual(0, calc.Absolute(0));
}
//Method of parsing inputExpression on each time where text on inputExpression is Changed
private void Parse()
{
//Declaration of variable
int startPosition, endPosition, index;
string parsedNumber = "";
double number, result;
//ScreenNumber is 1 if current screen is first screen otherwise 2
int screenNumber = isSecondPage ? 2 : 1;
//getting status
int status = int.Parse(String.Concat(screenNumber.ToString(), currentBtnIndex));
switch (status)
{
/*
* Explanation Here Case 102 Means:
* 1->First Screen
* 0->index of row i.e 0 means first row
* 2->index of column i.e 2 means third row
*/
case 102: //Square Root
{
startPosition = evaluationString.IndexOf("sqrt(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where sqrt( length is 5 so
for (index = (startPosition + 5); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.SquareRoot(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 110: //sin
{
startPosition = evaluationString.IndexOf("sin(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where sin( length is 4 so
for (index = (startPosition + 4); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Check calculator is in degree mode or not
if (isDegree)
{
number = Calc.DegreeToRadian(number);
}
//Round result
result = Math.Round(Calc.Sin(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 111: //cos
{
startPosition = evaluationString.IndexOf("cos(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where cos( length is 4 so
for (index = (startPosition + 4); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Check calculator is in degree mode or not
if (isDegree)
{
number = Calc.DegreeToRadian(number);
}
//Round result
result = Math.Round(Calc.Cos(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 112: //tan
{
startPosition = evaluationString.IndexOf("tan(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where tan( length is 4 so
for (index = (startPosition + 4); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Check calculator is in degree mode or not
if (isDegree)
{
number = Calc.DegreeToRadian(number);
}
//Round result
result = Math.Round(Calc.Tan(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 120: //ln
{
startPosition = evaluationString.IndexOf("ln(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where ln( length is 3 so
for (index = (startPosition + 3); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.Ln(number), 4);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 121: //log
{
startPosition = evaluationString.IndexOf("log(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where log( length is 4 so
for (index = (startPosition + 4); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.Log(number), 4);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 130: //e^
{
startPosition = evaluationString.IndexOf("e^(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where e^( length is 3 so
for (index = (startPosition + 3); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.Exponential(number), 5);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 140: //absolute
{
startPosition = evaluationString.IndexOf("abs(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where abs( length is 4 so
for (index = (startPosition + 4); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Calc.Absolute(number);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 202: //Cube root
{
startPosition = evaluationString.IndexOf("cbrt(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where cbrt( length is 5 so
for (index = (startPosition + 5); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.CubeRoot(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 210: //SineInverse
{
startPosition = evaluationString.IndexOf("Asin(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where Asin( length is 5 so
for (index = (startPosition + 5); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.SineInverse(number), 2);
//Check calculator is in degree mode or not
if (isDegree)
{
result = Math.Round(Calc.RadianToDegree(result), 3);
}
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 211: //CosInverse
{
startPosition = evaluationString.IndexOf("Acos(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where Acos( length is 5 so
for (index = (startPosition + 5); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.CosInverse(number), 2);
//Check calculator is in degree mode or not
if (isDegree)
{
result = Math.Round(Calc.RadianToDegree(result), 3);
}
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 212: //TanInverse
{
startPosition = evaluationString.IndexOf("Atan(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where Atan( length is 5 so
for (index = (startPosition + 5); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.TanInverse(number), 2);
//Check calculator is in degree mode or not
if (isDegree)
{
result = Math.Round(Calc.RadianToDegree(result), 3);
}
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 220: //Sine Hyperbolic
{
startPosition = evaluationString.IndexOf("sinh(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where sinh( length is 5 so
for (index = (startPosition + 5); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.SineHyperbolic(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 221: //Cos Hyperbolic
{
startPosition = evaluationString.IndexOf("cosh(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where cosh( length is 5 so
for (index = (startPosition + 5); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.CosHyperbolic(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 222: //Tan Hyperbolic
{
startPosition = evaluationString.IndexOf("tanh(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where tanh( length is 5 so
for (index = (startPosition + 5); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.TanHyperbolic(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 230: //Inverse Sine Hyperbolic
{
startPosition = evaluationString.IndexOf("Asinh(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where Asinh( length is 6 so
for (index = (startPosition + 6); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.InverseSineHyperbolic(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 231: //Inverse Cos Hyperbolic
{
startPosition = evaluationString.IndexOf("Acosh(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where Acosh( length is 6 so
for (index = (startPosition + 6); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.InverseCosHyperbolic(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 232: //Inverse Tan Hyperbolic
{
startPosition = evaluationString.IndexOf("Atanh(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where Atanh( length is 6 so
for (index = (startPosition + 6); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.InverseTanHyperbolic(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
case 240: //2^
{
startPosition = evaluationString.IndexOf("2^(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where 2^( length is 3 so
for (index = (startPosition + 3); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = double.Parse(parsedNumber);
//Round result
result = Math.Round(Calc.PowerOf2(number), 2);
//Than replaces in evaluationString
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
//Same process on three cases so
case 131:
case 132:
case 241:
{
string givenNumber = "";
startPosition = evaluationString.IndexOf("^(");
endPosition = evaluationString.IndexOf(")", startPosition);
//Where ^( length is 2 so
for (index = (startPosition + 2); index < endPosition; index++)
{
//Getting Number Lies inside Bracket
parsedNumber += evaluationString[index];
}
double power = double.Parse(parsedNumber);
//To get the actual number
index = startPosition - 1;
//Replace this with regular expression for short hand
while (index >= 0 && (evaluationString[index] != '+' && txtBoxExpression.Text[index] != '-' && txtBoxExpression.Text[index] != '*' && txtBoxExpression.Text[index] != '/' && txtBoxExpression.Text[index] != '%' && txtBoxExpression.Text[index] != '(' && txtBoxExpression.Text[index] != ')'))
{
givenNumber += evaluationString[index];
index--;
}
//Result
result = Math.Round(Calc.Power(double.Parse(givenNumber), power), 2);
//Replace result on txtBoxExpression
evaluationString = evaluationString.Remove(index + 1, endPosition - index).Insert(index + 1, result.ToString());
break;
}
case 242: //Factorial
{
startPosition = evaluationString.IndexOf("facto(");
endPosition = evaluationString.IndexOf(')', startPosition);
//Where ( length is 6 so
for (index = (startPosition + 6); index < endPosition; index++)
{
//Getting Number lies inside Bracket
parsedNumber += evaluationString[index];
}
//Parsing into float
number = Math.Abs(double.Parse(parsedNumber));
//Round result
result = Calc.Factorial(number);
//Than replaces in txBoxExpression
evaluationString = evaluationString.Remove(startPosition, (endPosition - startPosition + 1)).Insert(startPosition, result.ToString());
break;
}
//On Default Case do nothing
default: { break; }
}
}
