Create A Calculator In Windows Form Application

Here are the steps to create a simple calculator in Windows Forms.

• Create a Windows Application project from the file menu.
• FILE, New, then click Project.
• A popup window will appear. Choose “Windows” from the templates and choose the project “Windows Forms Application.” I have named it “Simple Calculator.”
• Create the form design using buttons and text boxes.
  
• Add 0-9, sign (/,*, -, +, %) buttons, backspace, Clear (C), and point (.) buttons.
• Add a textbox to show the results.
• On each button, click use the following login.

  private void btn0_Click(object sender, EventArgs e)
  {
      txtResult.Text = txtResult.Text + "0";
  }
  

  
• On operations buttons (+,-, /,*, %) take care of the following cases.
  1. The signs should not be in first place in the textbox i.e. +1, /2 etc.
  2. If you press point(.), then in add zero before point i.e. 0.9
  3. For the Backspace button, remove the last character from the textbox.
  4. For the C button clear the text of the text box.
  5. The signs should not appear twice i.e. 4++,9**
  6. The point should not come twice i.e. 2.3.5
  7. It cannot be divided by zero.
  8. Cannot find modulus by Zero.
• Now, we will follow the Microsoft Calculator logic for calculations.
• When we press the digit sign, then again we press the sign, the result of the first expression will be used for the next expression i.e.
  • 5+8+, and then the result will be 13+ in the result section.
• We have to take care of integer numbers as well as float numbers.
• For the Equal button, I have used the switch statement.
• For more information, please see the source code attached as zip.
  

Thank you.

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