001.using System;
002.using System.Collections.Generic;
003.using System.ComponentModel;
004.using System.Data;
005.using System.Drawing;
006.using System.Linq;
007.using System.Text;
008.using System.Windows.Forms;
009.
010.namespace WindowsFormsApplication4
011.{
012. public partial class Form1 : Form
013. {
014. int a;
015. bool plus = false;
016. bool minus = false;
017. bool multiply = false;
018. bool divide = false;
019. bool power = false;
020. public Form1()
021. {
022. InitializeComponent();
023. }
024.
025.
026. private void Form1_Load(object sender, EventArgs e)
027. {
028.
029. }
030.
031. private void button9_Click(object sender, EventArgs e)
032. {
033. textBox1.Text = textBox1.Text + "1";
034.
035. }
036.
037. private void button8_Click(object sender, EventArgs e)
038. {
039. textBox1.Text = textBox1.Text + "2";
040.
041. }
042.
043. private void button7_Click(object sender, EventArgs e)
044. {
045. textBox1.Text = textBox1.Text + "3";
046.
047. }
048.
049. private void button4_Click(object sender, EventArgs e)
050. {
051. textBox1.Text = textBox1.Text + "4";
052.
053. }
054.
055. private void button5_Click(object sender, EventArgs e)
056. {
057. textBox1.Text = textBox1.Text + "5";
058.
059. }
060.
061. private void button6_Click(object sender, EventArgs e)
062. {
063. textBox1.Text = textBox1.Text + "6";
064.
065. }
066.
067. private void button1_Click(object sender, EventArgs e)
068. {
069. textBox1.Text = textBox1.Text + "7";
070.
071. }
072.
073. private void button2_Click(object sender, EventArgs e)
074. {
075. textBox1.Text = textBox1.Text + "8";
076.
077. }
078.
079. private void button3_Click(object sender, EventArgs e)
080. {
081. textBox1.Text = textBox1.Text + "9";
082.
083. }
084.
085. private void button19_Click(object sender, EventArgs e)
086. {
087. textBox1.Text = "";
088. }
089.
090. private void button18_Click(object sender, EventArgs e)
091. {
092. int a = textBox1.Text.Length;
093. if (textBox1.Text == "")
094. {
095. textBox1.Text = "";
096. }
097. else
098. {
099. textBox1.Text = textBox1.Text.Remove(a - 1);
100. }
101.
102. }
103.
104. private void button13_Click(object sender, EventArgs e)
105. {
106. if (textBox1.Text == "")
107. {
108. return;
109. }
110. else
111. {
112. plus = true;
113. textBox1.Tag = textBox1.Text;
114. textBox1.Text = "";
115. }
116. }
117.
118. private void button17_Click(object sender, EventArgs e)
119. {
120. if (plus)
121. {
122. decimal dec = Convert.ToDecimal(textBox1.Tag) + Convert.ToDecimal(textBox1.Text);
123. textBox1.Text = dec.ToString();
124. }
125. else if (minus)
126. {
127. decimal dec = Convert.ToDecimal(textBox1.Tag) - Convert.ToDecimal(textBox1.Text);
128. textBox1.Text = dec.ToString();
129. }
130. else if (multiply)
131. {
132. decimal dec = Convert.ToDecimal(textBox1.Tag) * Convert.ToDecimal(textBox1.Text);
133. textBox1.Text = dec.ToString();
134. }
135. else if (divide)
136. {
137. if (textBox1.Text == "0")
138. {
139. textBox1.Text = "0";
140. }
141. else if (textBox1.Text != "0")
142. {
143. decimal dec = Convert.ToDecimal(textBox1.Tag) / Convert.ToDecimal(textBox1.Text);
144. textBox1.Text = dec.ToString();
145. }
146. }
147. else if (power)
148. {
149. decimal dec = Convert.ToDecimal(textBox1.Tag) * Convert.ToDecimal(textBox1.Tag);
150. textBox1.Text = dec.ToString();
151. }
152.
153.
154. return;
155. }
156.
157. private void button14_Click(object sender, EventArgs e)
158. {
159. if (textBox1.Text.Contains("."))
160. {
161. return;
162. }
163. else
164. {
165. textBox1.Text = textBox1.Text + ".";
166. }
167. }
168.
169. private void button12_Click(object sender, EventArgs e)
170. {
171. if (textBox1.Text == "")
172. {
173. return;
174. }
175. else
176. {
177. minus = true;
178. textBox1.Tag = textBox1.Text;
179. textBox1.Text = "";
180.
181. }
182. }
183.
184. private void button11_Click(object sender, EventArgs e)
185. {
186. if (textBox1.Text == "")
187. {
188. return;
189. }
190. else
191. {
192. multiply = true;
193. textBox1.Tag = textBox1.Text;
194. textBox1.Text = "";
195. }
196. }
197.
198. private void button10_Click(object sender, EventArgs e)
199. {
200. if (textBox1.Text == "")
201. {
202. return;
203. }
204. else
205. {
206. divide = true;
207. textBox1.Tag = textBox1.Text;
208. textBox1.Text = "";
209. }
210. }
211.
212. private void button15_Click(object sender, EventArgs e)
213. {
214. if (textBox1.Text != "0")
215. {
216. if (textBox1.Text.Contains('-'))
217. {
218. textBox1.Text = textBox1.Text.Remove(0, 1);
219. }
220. else
221. {
222. textBox1.Text = "-" + textBox1.Text;
223. }
224. }
225. }
226.
227. private void button16_Click(object sender, EventArgs e)
228. {
229. textBox1.Text = textBox1.Text + "0";
230. }
231.
232. private void textBox1_TextChanged(object sender, EventArgs e)
233. {
234.
235. }
236.
237. private void label1_Click(object sender, EventArgs e)
238. {
239.
240. }
241.
242. private void button20_Click(object sender, EventArgs e)
243. {
244.
245. }
246.
247. private void button20_Click_1(object sender, EventArgs e)
248. {
249. if (textBox1.Text == "")
250. {
251. return;
252. }
253. else
254. power = true;
255. textBox1.Tag = textBox1.Text;
256. textBox1.Text = "";
257. }
258. }
259. }
Quote:
เคยทำแต่แบบ กรอกตัวเลขลง textbox1 กะ textbox2 แล้วก็กดเครื่องหมายที่ต้องการ แล้วผลลัพธ์จะมาโชว์ที่ textbox3 อ่ะคับ ช่วยอธิบายที ขอบคุณล่วงหน้าคับ
