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Most people do not understand the knowledge points of this article "how to achieve simple calculator function in C#", so the editor summarizes the following content, detailed content, clear steps, and has a certain reference value. I hope you can get something after reading this article, let's take a look at this "how to achieve simple calculator function" article.

1. Interface design

two。 Code using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace calculator3 {public partial class Form1: Form {private string num1, Operand of the num2;// calculator, member variable private string opr;// operator public Form1 () {InitializeComponent () } / / the method of the number button click event private void NumClick (object sender, EventArgs e) {Button button = (Button) sender; if (string.IsNullOrEmpty (opr)) / / if the operator {num1 = num1 + button.Text;// has not been entered, enter the first number to participate in the operation String links hundred thousand} else {num2 = num2 + button.Text;// enter the second number participating in the operation One hundred thousand txtResult.Text = txtResult.Text + button.Text;} / / operator button click event method private void oprClick (object sender, EventArgs e) {Button button= (Button) sender If (String.IsNullOrEmpty (num2)) / / if no number has been entered, pressing the operator {MessageBox.Show is not allowed ("you should not press the operator at this time!") ; return;} opr = button.Text; txtResult.Text = txtResult.Text + button.Text } / / "=" event, that is, calculate private void btnGet_Click (object sender, EventArgs e) {if (String.IsNullOrEmpty (opr) | | String.IsNullOrEmpty (num1) | | String.IsNullOrEmpty (num2)) {MessageBox.Show ("you entered something wrong!") ; return;} txtResult.Text = txtResult.Text + "=" / / concatenate the "=" into the frame / / perform the operation of two numbers switch (opr) {case "+": txtResult.Text = txtResult.Text + (Int32.Parse (num1) + Int32.Parse (num2)); break Case "-": txtResult.Text = txtResult.Text + (Int32.Parse (num1)-Int32.Parse (num2)); break; case "*": txtResult.Text = txtResult.Text + (Int32.Parse (num1) * Int32.Parse (num2)); break Case "/": if (num2 = = "0") {MessageBox.Show ("Divisor cannot be zero!") ;} txtResult.Text = txtResult.Text + (Int32.Parse (num1) / Int32.Parse (num2)); break;}} / / clear event private void btnClear_Click (object sender, EventArgs e) {txtResult.Text = "" Num1 = ""; num2 = ""; opr = "";}} 3. Summary and analysis

Button click event: when most buttons have the same click effect, you can use the same Click event (with the same name)

/ / just to give an example, use / / key code Button button = (Button) sender;// the link to the string at this time num1 = num1 + button.Text;// enter the first number to participate in the operation String links of more than 100 thousand is about the content of this article on "how to achieve simple calculator functions in C#". I believe we all have some understanding. I hope the content shared by the editor will be helpful to you. If you want to know more about the relevant knowledge, please pay attention to the industry information channel.

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