<%@ Page Language="C#" Debug="True" %>
void Page_Load()
{
btnAdd.BackColor = System.Drawing.Color.LightGray;
btnSubtract.BackColor = System.Drawing.Color.LightGray;
btnMultiply.BackColor = System.Drawing.Color.LightGray;
btnDivide.BackColor = System.Drawing.Color.LightGray;
}
void Add(object sender, EventArgs e)
{
double answer = Convert.ToDouble(txtInput1.Text) +
Convert.ToDouble(txtInput2.Text);
lblAnswer.Text = answer.ToString();
btnAdd.BackColor = System.Drawing.Color.Yellow;
}
void Subtract(object sender, EventArgs e)
{
double answer = Convert.ToDouble(txtInput1.Text) -
Convert.ToDouble(txtInput2.Text);
lblAnswer.Text = answer.ToString();
btnSubtract.BackColor = System.Drawing.Color.Yellow;
}
void Multiply(object sender, EventArgs e)
{
double answer = Convert.ToDouble(txtInput1.Text) *
Convert.ToDouble(txtInput2.Text);
lblAnswer.Text = answer.ToString();
btnMultiply.BackColor = System.Drawing.Color.Yellow;
}
void Divide(object sender, EventArgs e)
{
double answer = Convert.ToDouble(txtInput1.Text) /
Convert.ToDouble(txtInput2.Text);
lblAnswer.Text = answer.ToString();
btnDivide.BackColor = System.Drawing.Color.Yellow;
}
Calculator example v1
Calculator Version 1
Answer =