Hi all,

I am developing calculator app using C#.I have successfuly implemented its standard arithmetic functions but a bit trapped in implementing scientific functions such as sin,cos.tan etc.
I take an operand1,then operator and finally second opernad to workout arithmetic calculations.In the very first attempt to do scientific calculation i for the sake of programme format first takes input followed by sin/cos/tan etc and then out result.

Here is my code:
 
 
  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Windows.Forms;
  10. namespace Calculator
  11. {
  12. public partial class Form1 : Form
  13. {
  15. string input = string.Empty;
  16. string operand1 = string.Empty;
  17. string operand2 = string.Empty;
  18. char operaton;
  19. double result = 0.0;
  22. public Form1()
  23. {
  24. InitializeComponent();
  25. }
  27. private void one_Click(object sender, EventArgs e)
  28. {
  29. this.textBox1.Text = " ";
  30. input += "1";
  31. this.textBox1.Text += input;
  32. }
  34. private void two_Click(object sender, EventArgs e)
  35. {
  36. this.textBox1.Text = " ";
  37. input += "2";
  38. this.textBox1.Text += input;
  39. }
  41. private void three_Click(object sender, EventArgs e)
  42. {
  43. this.textBox1.Text = " ";
  44. input += "3";
  45. this.textBox1.Text += input;
  46. }
  48. private void four_Click(object sender, EventArgs e)
  49. {
  50. this.textBox1.Text = " ";
  51. input += "4";
  52. this.textBox1.Text += input;
  53. }
  55. private void five_Click(object sender, EventArgs e)
  56. {
  57. this.textBox1.Text = " ";
  58. input += "5";
  59. this.textBox1.Text += input;
  61. }
  63. private void six_Click(object sender, EventArgs e)
  64. {
  65. this.textBox1.Text = " ";
  66. input += "6";
  67. this.textBox1.Text += input;
  68. }
  70. private void seven_Click(object sender, EventArgs e)
  71. {
  72. this.textBox1.Text = " ";
  73. input += "7";
  74. this.textBox1.Text += input;
  75. }
  77. private void eight_Click(object sender, EventArgs e)
  78. {
  79. this.textBox1.Text = " ";
  80. input += "8";
  81. this.textBox1.Text += input;
  82. }
  84. private void nine_Click(object sender, EventArgs e)
  85. {
  86. this.textBox1.Text = " ";
  87. input += "9";
  88. this.textBox1.Text += input;
  89. }
  91. private void dot_Click(object sender, EventArgs e)
  92. {
  93. this.textBox1.Text = " ";
  94. input += ".";
  95. this.textBox1.Text += input;
  96. }
  98. private void zero_Click(object sender, EventArgs e)
  99. {
  100. this.textBox1.Text = " ";
  101. input += "0";
  102. this.textBox1.Text += input;
  103. }
  105. private void clear_Click(object sender, EventArgs e)
  106. {
  107. this.textBox1.Text = "0";
  108. this.input = string.Empty;
  109. this.operand1 = string.Empty;
  110. this.operand2 = string.Empty;
  113. }
  115. private void plus_Click(object sender, EventArgs e)
  116. {
  117. operand1 = input;
  118. operaton = '+';
  119. input = string.Empty;
  120. }
  122. private void minus_Click(object sender, EventArgs e)
  123. {
  124. operand1 = input;
  125. operaton = '-';
  126. input = string.Empty;
  127. }
  129. private void mul_Click(object sender, EventArgs e)
  130. {
  131. operand1 = input;
  132. operaton = '*';
  133. input = string.Empty;
  134. }
  136. private void div_Click(object sender, EventArgs e)
  137. {
  138. operand1 = input;
  139. operaton = '/';
  140. input = string.Empty;
  141. }
  142. private void mod_Click(object sender, EventArgs e)
  143. {
  144. operand1 = input;
  145. operaton = '%';
  146. input = string.Empty;
  147. }
  149. private void sine_Click(object sender, EventArgs e)
  150. {
  151. operand1 = input;
  152. operaton = 's';
  153. input = string.Empty;
  154. }
  156. private void cosine_Click(object sender, EventArgs e)
  157. {
  158. operand1 = input;
  159. operaton = 'c';
  160. input = string.Empty;
  161. }
  163. private void tan_Click(object sender, EventArgs e)
  164. {
  165. operand1 = input;
  166. operaton = 't';
  167. input = string.Empty;
  168. }
  172. private void equals_Click(object sender, EventArgs e)
  173. {
  174. operand2 = input;
  175. double num1, num2;
  176. double.TryParse(operand1, out num1);
  177. double.TryParse(operand2, out num2);
  179. if (operaton == '+')
  180. {
  181. result = num1 + num2;
  182. textBox1.Text = result.ToString();
  183. }
  184. else if (operaton == '-')
  185. {
  186. result = num1 - num2;
  187. textBox1.Text = result.ToString();
  188. }
  189. else if (operaton == '*')
  190. {
  191. result = num1 * num2;
  192. textBox1.Text = result.ToString();
  193. }
  194. else if (operaton == '/')
  195. {
  196. if (num2 != 0)
  197. {
  198. result = num1 / num2;
  199. textBox1.Text = result.ToString();
  200. }
  201. else
  202. {
  203. textBox1.Text = "DIV/Zero!";
  204. }
  205. }
  207. else if (operaton == '%')
  208. {
  210. result = num1 % num2;
  211. textBox1.Text = result.ToString();
  214. }
  215. else if (operaton == 's')
  216. {
  217. int inp;
  218. int.TryParse(operand1, out inp);
  219. result = Math.Sin(inp);
  220. textBox1.Text = result.ToString();
  222. }
  223. else if (operaton == 'c')
  224. {
  225. int inp;
  226. int.TryParse(operand1, out inp);
  227. result = Math.Cos(num1);
  228. textBox1.Text = result.ToString();
  230. }
  231. else if (operaton == 't')
  232. {
  233. int inp;
  234. int.TryParse(operand1, out inp);
  235. result = Math.Tan(num1);
  236. textBox1.Text = result.ToString();
  238. }
  249. }
  253. }
  266. }

 
 

 

I want to mention here that my output for scientific functions is not correct.Also,kindly tell me error in this format as in second attempt i will convert it to standard scientific mode i.e. pressing sin/cos/tan and then operand.

Regards