private void BtnMultiply_Click(object sender, EventArgs e)
{
//if Input call the Third Party library and perform the multiplication function
if (CheckForInput(tbResult.Text))
{
if (!(plusButtonClicked && multiplyButtonClicked && minusButtonClicked && divisionButtonClicked))
{
valueHolder = double.Parse(tbResult.Text);
}
else
{
valueHolder = BasicMath.Multiplication(valueHolder, double.Parse(tbResult.Text));
}
tbResult.Clear();
plusButtonClicked = false;
minusButtonClicked = false;
divisionButtonClicked = false;
multiplyButtonClicked = true;
}
//if invalid input print error to user
else
{
MessageBox.Show("Please enter valid input");
}
isTotal = false;
}
static void Main(string[] args)
{
Console.WriteLine("Hello to Calc Test!");
Console.WriteLine(string.Format("{0} + {1} = {2}", 20, 22, BasicMath.Sum(20, 22)));
Console.WriteLine(string.Format("{0} - {1} = {2}", 50, 8, BasicMath.Difference(50, 8)));
Console.WriteLine(string.Format("{0} * {1} = {2}", 7, 6, BasicMath.Multiplication(7, 6)));
Console.WriteLine(string.Format("{0} / {1} = {2}", 420, 10, BasicMath.Division(420, 10)));
}
public void Should_True_One_Number_Multiplication()
{
//Arrange
double oneNumber = 76;
double multiplication;
//Act
multiplication = BasicMath.Multiplication(oneNumber);
//Assert
Assert.Equal(oneNumber, multiplication);
}
public void Should_True_Emtpy_Multiplication()
{
//Arrange
double multiplication;
double multiplicationNumber;
//Act
multiplicationNumber = 1;
multiplication = BasicMath.Multiplication();
//Assert
Assert.Equal(multiplicationNumber, multiplication);
}
public void Should_True_Two_Number_Multiplication()
{
//Arrange
double oneNumber = 3;
double twoNumber = 9;
double multiplicationNumber;
double multiplication;
//Act
multiplicationNumber = oneNumber * twoNumber;
multiplication = BasicMath.Multiplication(oneNumber, twoNumber);
//Assert
Assert.Equal(multiplicationNumber, multiplication);
}
private void BtnEquals_Click(object sender, EventArgs e)
{
/*depending on the last button to be clicked perform the correct operation
* and output the result to the user
*/
if (!(multiplyButtonClicked && minusButtonClicked &&
plusButtonClicked && divisionButtonClicked) && CheckForInput(tbResult.Text))
{
total = double.Parse(tbResult.Text);
}
if (!double.TryParse(tbResult.Text, out double lastInput))
{
return;
}
if (plusButtonClicked)
{
total = BasicMath.Addition(valueHolder, lastInput);
}
else if (minusButtonClicked)
{
total = BasicMath.Subtraction(valueHolder, lastInput);
}
else if (multiplyButtonClicked)
{
total = BasicMath.Multiplication(valueHolder, lastInput);
}
else if (divisionButtonClicked)
{
if (BasicMath.Division(valueHolder, lastInput, out double setTotal))
{
total = setTotal;
}
else
{
MessageBox.Show("Error: Cannot Divide By Zero");
return;
}
}
//print result
tbResult.Text = $"{total}";
//reset calculator
valueHolder = 0;
total = 0;
isTotal = true;
plusButtonClicked = minusButtonClicked = divisionButtonClicked = multiplyButtonClicked = false;
}