Operation error when two operations are clicked, i want error handling to take place so i cant put multiple * in a row
namespace Calculator_Assignment
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
float num, ans;
int count;
private void Form1_Load(object sender, EventArgs e)
{
}
private void Button_click(object sender, EventArgs e)
{
Button button = (Button)sender; //adds the numbers into the screen when clicked
Screen.Text = Screen.Text + button.Text;
Screen.ForeColor = Color.Red; //text that entered appears red
}
private void operatorclick(object sender, EventArgs e)
{
Button button = (Button)sender; //adds the symbols into the screen when clicked
Screen.Text = Screen.Text + button.Text; //all symbols are under button_click so i do not have to repeat the code over/
}
private void Clearclick(object sender, EventArgs e)
{
Screen.Clear(); //when clicked clears the screen
Result.Clear(); //when clicked clears the result
}
private void Decimalclick(object sender, EventArgs e)
{
Screen.Text = Screen.Text + "."; //adds decimal point to screen when/if clicked
Screen.ForeColor = Color.Red; //decimal point appears red
}
private void Closebtn_Click(object sender, EventArgs e)
{
this.Close(); // closes the application down
}
private void plusclick(object sender, EventArgs e) //addition
{
num = float.Parse(Screen.Text);
Screen.Clear(); //clears the screen of everything
Screen.Focus(); //textbox is focused upon when the screen is cleared
count = 1; //this counts the store case
Screen.Text = num.ToString() + "+"; //this puts the text onto the top text box
}
private void multiplyclick(object sender, EventArgs e) //multiply
{
num = float.Parse(Screen.Text);
Screen.Clear(); //clears the screen of everything
Screen.Focus(); //textbox is focused upon when the screen is cleared
count = 3; //this counts the store case
Result.Text = num.ToString() + "*"; //this puts the text onto the top textbox
}
private void divideclick(object sender, EventArgs e) //divide
{
num = float.Parse(Screen.Text);
Screen.Clear(); //clears the screen of everything
Screen.Focus(); //textbox is focused upon when the screen is cleared
count = 4; //this counts the store case
Screen.Text = num.ToString() + "/"; //this puts the text onto the
}
private void subtractclick(object sender, EventArgs e) //subtract
{
num = float.Parse(Screen.Text);
Screen.Clear(); //clears the screen of everything
Screen.Focus(); //textbox is focused upon when the screen is cleared
count = 2; //this counts the store case
Result.Text = num.ToString() + "-"; //this puts the text onto the label
}
private void equalsclick(object sender, EventArgs e)
{
switch (count) //initalising switch statement
{
case 1:
ans = num + float.Parse(Screen.Text);//Adding numbers
Result.Text = ans.ToString(); //this converts my answer from a float to a string
break;
case 2:
ans = num - float.Parse(Screen.Text); //Subtracting numbers
Result.Text = ans.ToString(); //float to a string
break;
case 3:
ans = num * float.Parse(Screen.Text); //Multiplying numbers
Result.Text = ans.ToString(); //float to a string
break;
case 4:
ans = num / float.Parse(Screen.Text); //Division of numbers
Result.Text = ans.ToString(); //float to a string
break;
default: //the default figure
break;
}
}
}
}
